---
Function {
 argument: Destructured {
  identifier: None,
  arguments: [
   DestructuredArgument {
    identifier: "config",
    default: None,
   },
   DestructuredArgument {
    identifier: "lib",
    default: None,
   },
   DestructuredArgument {
    identifier: "pkgs",
    default: None,
   },
  ],
  ellipsis: true,
 },
 definition: With {
  expression: Variable {
   identifier: "lib",
   position: (3, 6),
  },
  target: LetIn {
   bindings: [
    Binding {
     from: AttributePath {
      parts: [
       Raw {
        content: "settingsFormat",
        position: (6, 3),
       },
      ],
     },
     to: Map {
      bindings: [
       Binding {
        from: AttributePath {
         parts: [
          Raw {
           content: "type",
           position: (7, 5),
          },
         ],
        },
        to: With {
         expression: PropertyAccess {
          expression: Variable {
           identifier: "lib",
           position: (7, 17),
          },
          attribute_path: AttributePath {
           parts: [
            Raw {
             content: "types",
             position: (7, 21),
            },
           ],
          },
          default: None,
         },
         target: FunctionApplication {
          function: Variable {
           identifier: "attrsOf",
           position: (7, 28),
          },
          arguments: [
           Parentheses {
            expression: FunctionApplication {
             function: Variable {
              identifier: "oneOf",
              position: (7, 37),
             },
             arguments: [
              List {
               elements: [
                Variable {
                 identifier: "bool",
                 position: (7, 45),
                },
                Variable {
                 identifier: "int",
                 position: (7, 50),
                },
                Variable {
                 identifier: "str",
                 position: (7, 54),
                },
               ],
               position: (7, 43),
              },
             ],
            },
            position: (7, 36),
           },
          ],
         },
         position: (7, 12),
        },
       },
       Binding {
        from: AttributePath {
         parts: [
          Raw {
           content: "generate",
           position: (8, 5),
          },
         ],
        },
        to: Function {
         argument: Simple {
          identifier: "name",
         },
         definition: Function {
          argument: Simple {
           identifier: "attrs",
          },
          definition: FunctionApplication {
           function: PropertyAccess {
            expression: Variable {
             identifier: "pkgs",
             position: (9, 7),
            },
            attribute_path: AttributePath {
             parts: [
              Raw {
               content: "writeText",
               position: (9, 12),
              },
             ],
            },
            default: None,
           },
           arguments: [
            Variable {
             identifier: "name",
             position: (9, 22),
            },
            Parentheses {
             expression: FunctionApplication {
              function: PropertyAccess {
               expression: Variable {
                identifier: "lib",
                position: (9, 28),
               },
               attribute_path: AttributePath {
                parts: [
                 Raw {
                  content: "strings",
                  position: (9, 32),
                 },
                 Raw {
                  content: "concatStringsSep",
                  position: (9, 40),
                 },
                ],
               },
               default: None,
              },
              arguments: [
               String {
                parts: [
                 Raw {
                  content: "\n",
                  position: (9, 58),
                 },
                ],
                position: (9, 57),
               },
               Parentheses {
                expression: FunctionApplication {
                 function: PropertyAccess {
                  expression: Variable {
                   identifier: "lib",
                   position: (10, 10),
                  },
                  attribute_path: AttributePath {
                   parts: [
                    Raw {
                     content: "attrsets",
                     position: (10, 14),
                    },
                    Raw {
                     content: "mapAttrsToList",
                     position: (10, 23),
                    },
                   ],
                  },
                  default: None,
                 },
                 arguments: [
                  Parentheses {
                   expression: Function {
                    argument: Simple {
                     identifier: "key",
                    },
                    definition: Function {
                     argument: Simple {
                      identifier: "value",
                     },
                     definition: String {
                      parts: [
                       Interpolation {
                        expression: Variable {
                         identifier: "key",
                         position: (11, 27),
                        },
                       },
                       Raw {
                        content: "=",
                        position: (11, 31),
                       },
                       Interpolation {
                        expression: FunctionApplication {
                         function: PropertyAccess {
                          expression: Variable {
                           identifier: "builtins",
                           position: (11, 34),
                          },
                          attribute_path: AttributePath {
                           parts: [
                            Raw {
                             content: "toJSON",
                             position: (11, 43),
                            },
                           ],
                          },
                          default: None,
                         },
                         arguments: [
                          Variable {
                           identifier: "value",
                           position: (11, 50),
                          },
                         ],
                        },
                       },
                      ],
                      position: (11, 24),
                     },
                     position: (11, 17),
                    },
                    position: (11, 12),
                   },
                   position: (11, 11),
                  },
                  Variable {
                   identifier: "attrs",
                   position: (11, 59),
                  },
                 ],
                },
                position: (10, 9),
               },
              ],
             },
             position: (9, 27),
            },
           ],
          },
          position: (8, 22),
         },
         position: (8, 16),
        },
       },
      ],
      recursive: false,
      position: (6, 20),
     },
    },
   ],
   target: Map {
    bindings: [
     Binding {
      from: AttributePath {
       parts: [
        Raw {
         content: "options",
         position: (14, 3),
        },
       ],
      },
      to: Map {
       bindings: [
        Binding {
         from: AttributePath {
          parts: [
           Raw {
            content: "services",
            position: (16, 5),
           },
           Raw {
            content: "uhub",
            position: (16, 14),
           },
          ],
         },
         to: FunctionApplication {
          function: Variable {
           identifier: "mkOption",
           position: (16, 21),
          },
          arguments: [
           Map {
            bindings: [
             Binding {
              from: AttributePath {
               parts: [
                Raw {
                 content: "default",
                 position: (17, 7),
                },
               ],
              },
              to: Map {
               bindings: [],
               recursive: false,
               position: (17, 17),
              },
             },
             Binding {
              from: AttributePath {
               parts: [
                Raw {
                 content: "description",
                 position: (18, 7),
                },
               ],
              },
              to: String {
               parts: [
                Raw {
                 content: "Uhub ADC hub instances",
                 position: (18, 22),
                },
               ],
               position: (18, 21),
              },
             },
             Binding {
              from: AttributePath {
               parts: [
                Raw {
                 content: "type",
                 position: (19, 7),
                },
               ],
              },
              to: FunctionApplication {
               function: PropertyAccess {
                expression: Variable {
                 identifier: "types",
                 position: (19, 14),
                },
                attribute_path: AttributePath {
                 parts: [
                  Raw {
                   content: "attrsOf",
                   position: (19, 20),
                  },
                 ],
                },
                default: None,
               },
               arguments: [
                Parentheses {
                 expression: FunctionApplication {
                  function: PropertyAccess {
                   expression: Variable {
                    identifier: "types",
                    position: (19, 29),
                   },
                   attribute_path: AttributePath {
                    parts: [
                     Raw {
                      content: "submodule",
                      position: (19, 35),
                     },
                    ],
                   },
                   default: None,
                  },
                  arguments: [
                   Map {
                    bindings: [
                     Binding {
                      from: AttributePath {
                       parts: [
                        Raw {
                         content: "options",
                         position: (20, 9),
                        },
                       ],
                      },
                      to: Map {
                       bindings: [
                        Binding {
                         from: AttributePath {
                          parts: [
                           Raw {
                            content: "enable",
                            position: (22, 11),
                           },
                          ],
                         },
                         to: BinaryOperation {
                          operator: Update,
                          operands: [
                           FunctionApplication {
                            function: Variable {
                             identifier: "mkEnableOption",
                             position: (22, 20),
                            },
                            arguments: [
                             String {
                              parts: [
                               Raw {
                                content: "hub instance",
                                position: (22, 36),
                               },
                              ],
                              position: (22, 35),
                             },
                            ],
                           },
                           Map {
                            bindings: [
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "default",
                                 position: (22, 55),
                                },
                               ],
                              },
                              to: Variable {
                               identifier: "true",
                               position: (22, 65),
                              },
                             },
                            ],
                            recursive: false,
                            position: (22, 53),
                           },
                          ],
                          position: (22, 50),
                         },
                        },
                        Binding {
                         from: AttributePath {
                          parts: [
                           Raw {
                            content: "enableTLS",
                            position: (24, 11),
                           },
                          ],
                         },
                         to: FunctionApplication {
                          function: Variable {
                           identifier: "mkOption",
                           position: (24, 23),
                          },
                          arguments: [
                           Map {
                            bindings: [
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "type",
                                 position: (25, 13),
                                },
                               ],
                              },
                              to: PropertyAccess {
                               expression: Variable {
                                identifier: "types",
                                position: (25, 20),
                               },
                               attribute_path: AttributePath {
                                parts: [
                                 Raw {
                                  content: "bool",
                                  position: (25, 26),
                                 },
                                ],
                               },
                               default: None,
                              },
                             },
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "default",
                                 position: (26, 13),
                                },
                               ],
                              },
                              to: Variable {
                               identifier: "false",
                               position: (26, 23),
                              },
                             },
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "description",
                                 position: (27, 13),
                                },
                               ],
                              },
                              to: String {
                               parts: [
                                Raw {
                                 content: "Whether to enable TLS support.",
                                 position: (27, 28),
                                },
                               ],
                               position: (27, 27),
                              },
                             },
                            ],
                            recursive: false,
                            position: (24, 32),
                           },
                          ],
                         },
                        },
                        Binding {
                         from: AttributePath {
                          parts: [
                           Raw {
                            content: "settings",
                            position: (30, 11),
                           },
                          ],
                         },
                         to: FunctionApplication {
                          function: Variable {
                           identifier: "mkOption",
                           position: (30, 22),
                          },
                          arguments: [
                           Map {
                            bindings: [
                             Inherit {
                              from: Some(
                               Variable {
                                identifier: "settingsFormat",
                                position: (31, 22),
                               },
                              ),
                              attributes: [
                               Raw {
                                content: "type",
                                position: (31, 38),
                               },
                              ],
                             },
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "description",
                                 position: (32, 13),
                                },
                               ],
                              },
                              to: String {
                               parts: [
                                Raw {
                                 content: "Configuration of uhub.\nSee https://www.uhub.org/doc/config.php for a list of options.\n",
                                 position: (33, 1),
                                },
                               ],
                               position: (32, 27),
                              },
                             },
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "default",
                                 position: (36, 13),
                                },
                               ],
                              },
                              to: Map {
                               bindings: [],
                               recursive: false,
                               position: (36, 23),
                              },
                             },
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "example",
                                 position: (37, 13),
                                },
                               ],
                              },
                              to: Map {
                               bindings: [
                                Binding {
                                 from: AttributePath {
                                  parts: [
                                   Raw {
                                    content: "server_bind_addr",
                                    position: (38, 15),
                                   },
                                  ],
                                 },
                                 to: String {
                                  parts: [
                                   Raw {
                                    content: "any",
                                    position: (38, 35),
                                   },
                                  ],
                                  position: (38, 34),
                                 },
                                },
                                Binding {
                                 from: AttributePath {
                                  parts: [
                                   Raw {
                                    content: "server_port",
                                    position: (39, 15),
                                   },
                                  ],
                                 },
                                 to: Int {
                                  value: 1511,
                                  position: (39, 29),
                                 },
                                },
                                Binding {
                                 from: AttributePath {
                                  parts: [
                                   Raw {
                                    content: "hub_name",
                                    position: (40, 15),
                                   },
                                  ],
                                 },
                                 to: String {
                                  parts: [
                                   Raw {
                                    content: "My Public Hub",
                                    position: (40, 27),
                                   },
                                  ],
                                  position: (40, 26),
                                 },
                                },
                                Binding {
                                 from: AttributePath {
                                  parts: [
                                   Raw {
                                    content: "hub_description",
                                    position: (41, 15),
                                   },
                                  ],
                                 },
                                 to: String {
                                  parts: [
                                   Raw {
                                    content: "Yet another ADC hub",
                                    position: (41, 34),
                                   },
                                  ],
                                  position: (41, 33),
                                 },
                                },
                                Binding {
                                 from: AttributePath {
                                  parts: [
                                   Raw {
                                    content: "max_users",
                                    position: (42, 15),
                                   },
                                  ],
                                 },
                                 to: Int {
                                  value: 150,
                                  position: (42, 27),
                                 },
                                },
                               ],
                               recursive: false,
                               position: (37, 23),
                              },
                             },
                            ],
                            recursive: false,
                            position: (30, 31),
                           },
                          ],
                         },
                        },
                        Binding {
                         from: AttributePath {
                          parts: [
                           Raw {
                            content: "plugins",
                            position: (46, 11),
                           },
                          ],
                         },
                         to: FunctionApplication {
                          function: Variable {
                           identifier: "mkOption",
                           position: (46, 21),
                          },
                          arguments: [
                           Map {
                            bindings: [
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "description",
                                 position: (47, 13),
                                },
                               ],
                              },
                              to: String {
                               parts: [
                                Raw {
                                 content: "Uhub plugin configuration.",
                                 position: (47, 28),
                                },
                               ],
                               position: (47, 27),
                              },
                             },
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "type",
                                 position: (48, 13),
                                },
                               ],
                              },
                              to: With {
                               expression: Variable {
                                identifier: "types",
                                position: (48, 25),
                               },
                               target: FunctionApplication {
                                function: Variable {
                                 identifier: "listOf",
                                 position: (49, 15),
                                },
                                arguments: [
                                 Parentheses {
                                  expression: FunctionApplication {
                                   function: Variable {
                                    identifier: "submodule",
                                    position: (49, 23),
                                   },
                                   arguments: [
                                    Map {
                                     bindings: [
                                      Binding {
                                       from: AttributePath {
                                        parts: [
                                         Raw {
                                          content: "options",
                                          position: (50, 17),
                                         },
                                        ],
                                       },
                                       to: Map {
                                        bindings: [
                                         Binding {
                                          from: AttributePath {
                                           parts: [
                                            Raw {
                                             content: "plugin",
                                             position: (51, 19),
                                            },
                                           ],
                                          },
                                          to: FunctionApplication {
                                           function: Variable {
                                            identifier: "mkOption",
                                            position: (51, 28),
                                           },
                                           arguments: [
                                            Map {
                                             bindings: [
                                              Binding {
                                               from: AttributePath {
                                                parts: [
                                                 Raw {
                                                  content: "type",
                                                  position: (52, 21),
                                                 },
                                                ],
                                               },
                                               to: Variable {
                                                identifier: "path",
                                                position: (52, 28),
                                               },
                                              },
                                              Binding {
                                               from: AttributePath {
                                                parts: [
                                                 Raw {
                                                  content: "example",
                                                  position: (53, 21),
                                                 },
                                                ],
                                               },
                                               to: FunctionApplication {
                                                function: Variable {
                                                 identifier: "literalExpression",
                                                 position: (53, 31),
                                                },
                                                arguments: [
                                                 String {
                                                  parts: [
                                                   Raw {
                                                    content: "$${pkgs.uhub}/plugins/mod_auth_sqlite.so",
                                                    position: (54, 24),
                                                   },
                                                  ],
                                                  position: (54, 23),
                                                 },
                                                ],
                                               },
                                              },
                                              Binding {
                                               from: AttributePath {
                                                parts: [
                                                 Raw {
                                                  content: "description",
                                                  position: (55, 21),
                                                 },
                                                ],
                                               },
                                               to: String {
                                                parts: [
                                                 Raw {
                                                  content: "Path to plugin file.",
                                                  position: (55, 36),
                                                 },
                                                ],
                                                position: (55, 35),
                                               },
                                              },
                                             ],
                                             recursive: false,
                                             position: (51, 37),
                                            },
                                           ],
                                          },
                                         },
                                         Binding {
                                          from: AttributePath {
                                           parts: [
                                            Raw {
                                             content: "settings",
                                             position: (57, 19),
                                            },
                                           ],
                                          },
                                          to: FunctionApplication {
                                           function: Variable {
                                            identifier: "mkOption",
                                            position: (57, 30),
                                           },
                                           arguments: [
                                            Map {
                                             bindings: [
                                              Binding {
                                               from: AttributePath {
                                                parts: [
                                                 Raw {
                                                  content: "description",
                                                  position: (58, 21),
                                                 },
                                                ],
                                               },
                                               to: String {
                                                parts: [
                                                 Raw {
                                                  content: "Settings specific to this plugin.",
                                                  position: (58, 36),
                                                 },
                                                ],
                                                position: (58, 35),
                                               },
                                              },
                                              Binding {
                                               from: AttributePath {
                                                parts: [
                                                 Raw {
                                                  content: "type",
                                                  position: (59, 21),
                                                 },
                                                ],
                                               },
                                               to: With {
                                                expression: Variable {
                                                 identifier: "types",
                                                 position: (59, 33),
                                                },
                                                target: FunctionApplication {
                                                 function: Variable {
                                                  identifier: "attrsOf",
                                                  position: (59, 40),
                                                 },
                                                 arguments: [
                                                  Variable {
                                                   identifier: "str",
                                                   position: (59, 48),
                                                  },
                                                 ],
                                                },
                                                position: (59, 28),
                                               },
                                              },
                                              Binding {
                                               from: AttributePath {
                                                parts: [
                                                 Raw {
                                                  content: "example",
                                                  position: (60, 21),
                                                 },
                                                ],
                                               },
                                               to: Map {
                                                bindings: [
                                                 Binding {
                                                  from: AttributePath {
                                                   parts: [
                                                    Raw {
                                                     content: "file",
                                                     position: (60, 33),
                                                    },
                                                   ],
                                                  },
                                                  to: String {
                                                   parts: [
                                                    Raw {
                                                     content: "/etc/uhub/users.db",
                                                     position: (60, 41),
                                                    },
                                                   ],
                                                   position: (60, 40),
                                                  },
                                                 },
                                                ],
                                                recursive: false,
                                                position: (60, 31),
                                               },
                                              },
                                             ],
                                             recursive: false,
                                             position: (57, 39),
                                            },
                                           ],
                                          },
                                         },
                                        ],
                                        recursive: false,
                                        position: (50, 27),
                                       },
                                      },
                                     ],
                                     recursive: false,
                                     position: (49, 33),
                                    },
                                   ],
                                  },
                                  position: (49, 22),
                                 },
                                ],
                               },
                               position: (48, 20),
                              },
                             },
                             Binding {
                              from: AttributePath {
                               parts: [
                                Raw {
                                 content: "default",
                                 position: (64, 13),
                                },
                               ],
                              },
                              to: List {
                               elements: [],
                               position: (64, 23),
                              },
                             },
                            ],
                            recursive: false,
                            position: (46, 30),
                           },
                          ],
                         },
                        },
                       ],
                       recursive: false,
                       position: (20, 19),
                      },
                     },
                    ],
                    recursive: false,
                    position: (19, 45),
                   },
                  ],
                 },
                 position: (19, 28),
                },
               ],
              },
             },
            ],
            recursive: false,
            position: (16, 30),
           },
          ],
         },
        },
       ],
       recursive: false,
       position: (14, 13),
      },
     },
     Binding {
      from: AttributePath {
       parts: [
        Raw {
         content: "config",
         position: (73, 3),
        },
       ],
      },
      to: LetIn {
       bindings: [
        Binding {
         from: AttributePath {
          parts: [
           Raw {
            content: "hubs",
            position: (74, 5),
           },
          ],
         },
         to: FunctionApplication {
          function: PropertyAccess {
           expression: Variable {
            identifier: "lib",
            position: (74, 12),
           },
           attribute_path: AttributePath {
            parts: [
             Raw {
              content: "attrsets",
              position: (74, 16),
             },
             Raw {
              content: "filterAttrs",
              position: (74, 25),
             },
            ],
           },
           default: None,
          },
          arguments: [
           Parentheses {
            expression: Function {
             argument: Simple {
              identifier: "_",
             },
             definition: Function {
              argument: Simple {
               identifier: "cfg",
              },
              definition: PropertyAccess {
               expression: Variable {
                identifier: "cfg",
                position: (74, 46),
               },
               attribute_path: AttributePath {
                parts: [
                 Raw {
                  content: "enable",
                  position: (74, 50),
                 },
                ],
               },
               default: None,
              },
              position: (74, 41),
             },
             position: (74, 38),
            },
            position: (74, 37),
           },
           PropertyAccess {
            expression: Variable {
             identifier: "config",
             position: (74, 58),
            },
            attribute_path: AttributePath {
             parts: [
              Raw {
               content: "services",
               position: (74, 65),
              },
              Raw {
               content: "uhub",
               position: (74, 74),
              },
             ],
            },
            default: None,
           },
          ],
         },
        },
       ],
       target: Map {
        bindings: [
         Binding {
          from: AttributePath {
           parts: [
            Raw {
             content: "environment",
             position: (77, 5),
            },
            Raw {
             content: "etc",
             position: (77, 17),
            },
           ],
          },
          to: FunctionApplication {
           function: PropertyAccess {
            expression: Variable {
             identifier: "lib",
             position: (77, 23),
            },
            attribute_path: AttributePath {
             parts: [
              Raw {
               content: "attrsets",
               position: (77, 27),
              },
              Raw {
               content: "mapAttrs'",
               position: (77, 36),
              },
             ],
            },
            default: None,
           },
           arguments: [
            Parentheses {
             expression: Function {
              argument: Simple {
               identifier: "name",
              },
              definition: Function {
               argument: Simple {
                identifier: "cfg",
               },
               definition: LetIn {
                bindings: [
                 Binding {
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