---
Function {
 argument: None,
 arguments: FunctionArguments {
  arguments: [
   FunctionArgument {
    identifier: "lib",
    default: None,
   },
   FunctionArgument {
    identifier: "pkgs",
    default: None,
   },
   FunctionArgument {
    identifier: "config",
    default: None,
   },
  ],
  ellipsis: true,
 },
 definition: LetIn {
  bindings: [
   KeyValue(
    AttributePath {
     attributes: [
      Raw {
       content: "cfg",
       position: (3, 3),
      },
     ],
    },
    PropertyAccess {
     expression: Variable {
      identifier: "config",
      position: (3, 9),
     },
     attribute_path: AttributePath {
      attributes: [
       Raw {
        content: "services",
        position: (3, 16),
       },
       Raw {
        content: "btrbk",
        position: (3, 25),
       },
      ],
     },
     default: None,
    },
   ),
   KeyValue(
    AttributePath {
     attributes: [
      Raw {
       content: "sshEnabled",
       position: (4, 3),
      },
     ],
    },
    BinaryOperation {
     operator: NotEqualTo,
     operands: [
      PropertyAccess {
       expression: Variable {
        identifier: "cfg",
        position: (4, 16),
       },
       attribute_path: AttributePath {
        attributes: [
         Raw {
          content: "sshAccess",
          position: (4, 20),
         },
        ],
       },
       default: None,
      },
      List {
       elements: [],
       position: (4, 33),
      },
     ],
     position: (4, 30),
    },
   ),
   KeyValue(
    AttributePath {
     attributes: [
      Raw {
       content: "serviceEnabled",
       position: (5, 3),
      },
     ],
    },
    BinaryOperation {
     operator: NotEqualTo,
     operands: [
      PropertyAccess {
       expression: Variable {
        identifier: "cfg",
        position: (5, 20),
       },
       attribute_path: AttributePath {
        attributes: [
         Raw {
          content: "instances",
          position: (5, 24),
         },
        ],
       },
       default: None,
      },
      Map {
       bindings: [],
       recursive: false,
       position: (5, 37),
      },
     ],
     position: (5, 34),
    },
   ),
   KeyValue(
    AttributePath {
     attributes: [
      Raw {
       content: "attr2Lines",
       position: (6, 3),
      },
     ],
    },
    Function {
     argument: Some(
      "attr",
     ),
     arguments: FunctionArguments {
      arguments: [],
      ellipsis: false,
     },
     definition: LetIn {
      bindings: [
       KeyValue(
        AttributePath {
         attributes: [
          Raw {
           content: "pairs",
           position: (8, 7),
          },
         ],
        },
        FunctionApplication {
         function: PropertyAccess {
          expression: Variable {
           identifier: "lib",
           position: (8, 15),
          },
          attribute_path: AttributePath {
           attributes: [
            Raw {
             content: "attrsets",
             position: (8, 19),
            },
            Raw {
             content: "mapAttrsToList",
             position: (8, 28),
            },
           ],
          },
          default: None,
         },
         arguments: [
          Function {
           argument: Some(
            "name",
           ),
           arguments: FunctionArguments {
            arguments: [],
            ellipsis: false,
           },
           definition: Function {
            argument: Some(
             "value",
            ),
            arguments: FunctionArguments {
             arguments: [],
             ellipsis: false,
            },
            definition: Map {
             bindings: [
              Inherit(
               None,
               [
                Raw {
                 content: "name",
                 position: (8, 67),
                },
                Raw {
                 content: "value",
                 position: (8, 72),
                },
               ],
              ),
             ],
             recursive: false,
             position: (8, 57),
            },
            position: (8, 50),
           },
           position: (8, 44),
          },
          Variable {
           identifier: "attr",
           position: (8, 82),
          },
         ],
        },
       ),
       KeyValue(
        AttributePath {
         attributes: [
          Raw {
           content: "isSubsection",
           position: (9, 7),
          },
         ],
        },
        Function {
         argument: Some(
          "value",
         ),
         arguments: FunctionArguments {
          arguments: [],
          ellipsis: false,
         },
         definition: IfThenElse {
          predicate: FunctionApplication {
           function: PropertyAccess {
            expression: Variable {
             identifier: "builtins",
             position: (10, 12),
            },
            attribute_path: AttributePath {
             attributes: [
              Raw {
               content: "isAttrs",
               position: (10, 21),
              },
             ],
            },
            default: None,
           },
           arguments: [
            Variable {
             identifier: "value",
             position: (10, 29),
            },
           ],
          },
          then: Variable {
           identifier: "true",
           position: (10, 40),
          },
          else_: IfThenElse {
           predicate: FunctionApplication {
            function: PropertyAccess {
             expression: Variable {
              identifier: "builtins",
              position: (11, 17),
             },
             attribute_path: AttributePath {
              attributes: [
               Raw {
                content: "isString",
                position: (11, 26),
               },
              ],
             },
             default: None,
            },
            arguments: [
             Variable {
              identifier: "value",
              position: (11, 35),
             },
            ],
           },
           then: Variable {
            identifier: "false",
            position: (11, 46),
           },
           else_: FunctionApplication {
            function: Variable {
             identifier: "throw",
             position: (12, 14),
            },
            arguments: [
             String {
              parts: [
               Raw {
                content: "invalid type in btrbk config ",
                position: (12, 21),
               },
               Expression {
                expression: FunctionApplication {
                 function: PropertyAccess {
                  expression: Variable {
                   identifier: "builtins",
                   position: (12, 52),
                  },
                  attribute_path: AttributePath {
                   attributes: [
                    Raw {
                     content: "typeOf",
                     position: (12, 61),
                    },
                   ],
                  },
                  default: None,
                 },
                 arguments: [
                  Variable {
                   identifier: "value",
                   position: (12, 68),
                  },
                 ],
                },
               },
              ],
             },
            ],
           },
           position: (11, 14),
          },
          position: (10, 9),
         },
         position: (9, 22),
        },
       ),
       KeyValue(
        AttributePath {
         attributes: [
          Raw {
           content: "sortedPairs",
           position: (13, 7),
          },
         ],
        },
        FunctionApplication {
         function: PropertyAccess {
          expression: Variable {
           identifier: "lib",
           position: (13, 21),
          },
          attribute_path: AttributePath {
           attributes: [
            Raw {
             content: "lists",
             position: (13, 25),
            },
            Raw {
             content: "partition",
             position: (13, 31),
            },
           ],
          },
          default: None,
         },
         arguments: [
          Function {
           argument: Some(
            "x",
           ),
           arguments: FunctionArguments {
            arguments: [],
            ellipsis: false,
           },
           definition: FunctionApplication {
            function: Variable {
             identifier: "isSubsection",
             position: (13, 45),
            },
            arguments: [
             PropertyAccess {
              expression: Variable {
               identifier: "x",
               position: (13, 58),
              },
              attribute_path: AttributePath {
               attributes: [
                Raw {
                 content: "value",
                 position: (13, 60),
                },
               ],
              },
              default: None,
             },
            ],
           },
           position: (13, 42),
          },
          Variable {
           identifier: "pairs",
           position: (13, 67),
          },
         ],
        },
       ),
      ],
      target: FunctionApplication {
       function: PropertyAccess {
        expression: Variable {
         identifier: "lib",
         position: (15, 5),
        },
        attribute_path: AttributePath {
         attributes: [
          Raw {
           content: "flatten",
           position: (15, 9),
          },
         ],
        },
        default: None,
       },
       arguments: [
        BinaryOperation {
         operator: Concatenation,
         operands: [
          FunctionApplication {
           function: Variable {
            identifier: "map",
            position: (18, 9),
           },
           arguments: [
            Function {
             argument: Some(
              "pair",
             ),
             arguments: FunctionArguments {
              arguments: [],
              ellipsis: false,
             },
             definition: List {
              elements: [
               String {
                parts: [
                 Expression {
                  expression: PropertyAccess {
                   expression: Variable {
                    identifier: "pair",
                    position: (18, 25),
                   },
                   attribute_path: AttributePath {
                    attributes: [
                     Raw {
                      content: "name",
                      position: (18, 30),
                     },
                    ],
                   },
                   default: None,
                  },
                 },
                 Raw {
                  content: " ",
                  position: (18, 35),
                 },
                 Expression {
                  expression: PropertyAccess {
                   expression: Variable {
                    identifier: "pair",
                    position: (18, 38),
                   },
                   attribute_path: AttributePath {
                    attributes: [
                     Raw {
                      content: "value",
                      position: (18, 43),
                     },
                    ],
                   },
                   default: None,
                  },
                 },
                ],
               },
              ],
              position: (18, 20),
             },
             position: (18, 14),
            },
            PropertyAccess {
             expression: Variable {
              identifier: "sortedPairs",
              position: (18, 54),
             },
             attribute_path: AttributePath {
              attributes: [
               Raw {
                content: "wrong",
                position: (18, 66),
               },
              ],
             },
             default: None,
            },
           ],
          },
          FunctionApplication {
           function: Variable {
            identifier: "map",
            position: (22, 9),
           },
           arguments: [
            Function {
             argument: Some(
              "pair",
             ),
             arguments: FunctionArguments {
              arguments: [],
              ellipsis: false,
             },
             definition: FunctionApplication {
              function: PropertyAccess {
               expression: Variable {
                identifier: "lib",
                position: (25, 13),
               },
               attribute_path: AttributePath {
                attributes: [
                 Raw {
                  content: "mapAttrsToList",
                  position: (25, 17),
                 },
                ],
               },
               default: None,
              },
              arguments: [
               Function {
                argument: Some(
                 "childname",
                ),
                arguments: FunctionArguments {
                 arguments: [],
                 ellipsis: false,
                },
                definition: Function {
                 argument: Some(
                  "value",
                 ),
                 arguments: FunctionArguments {
                  arguments: [],
                  ellipsis: false,
                 },
                 definition: BinaryOperation {
                  operator: Concatenation,
                  operands: [
                   List {
                    elements: [
                     String {
                      parts: [
                       Expression {
                        expression: PropertyAccess {
                         expression: Variable {
                          identifier: "pair",
                          position: (28, 24),
                         },
                         attribute_path: AttributePath {
                          attributes: [
                           Raw {
                            content: "name",
                            position: (28, 29),
                           },
                          ],
                         },
                         default: None,
                        },
                       },
                       Raw {
                        content: " ",
                        position: (28, 34),
                       },
                       Expression {
                        expression: Variable {
                         identifier: "childname",
                         position: (28, 37),
                        },
                       },
                      ],
                     },
                    ],
                    position: (28, 19),
                   },
                   FunctionApplication {
                    function: Variable {
                     identifier: "map",
                     position: (28, 55),
                    },
                    arguments: [
                     Function {
                      argument: Some(
                       "x",
                      ),
                      arguments: FunctionArguments {
                       arguments: [],
                       ellipsis: false,
                      },
                      definition: BinaryOperation {
                       operator: Addition,
                       operands: [
                        String {
                         parts: [
                          Raw {
                           content: " ",
                           position: (28, 64),
                          },
                         ],
                        },
                        Variable {
                         identifier: "x",
                         position: (28, 69),
                        },
                       ],
                       position: (28, 67),
                      },
                      position: (28, 60),
                     },
                     FunctionApplication {
                      function: Variable {
                       identifier: "attr2Lines",
                       position: (28, 73),
                      },
                      arguments: [
                       Variable {
                        identifier: "value",
                        position: (28, 84),
                       },
                      ],
                     },
                    ],
                   },
                  ],
                  position: (28, 51),
                 },
                 position: (27, 28),
                },
                position: (27, 17),
               },
               PropertyAccess {
                expression: Variable {
                 identifier: "pair",
                 position: (30, 15),
                },
                attribute_path: AttributePath {
                 attributes: [
                  Raw {
                   content: "value",
                   position: (30, 20),
                  },
                 ],
                },
                default: None,
               },
              ],
             },
             position: (24, 13),
            },
            PropertyAccess {
             expression: Variable {
              identifier: "sortedPairs",
              position: (32, 11),
             },
             attribute_path: AttributePath {
              attributes: [
               Raw {
                content: "right",
                position: (32, 23),
               },
              ],
             },
             default: None,
            },
           ],
          },
         ],
         position: (20, 7),
        },
       ],
      },
      position: (7, 5),
     },
     position: (6, 16),
    },
   ),
   KeyValue(
    AttributePath {
     attributes: [
      Raw {
       content: "addDefaults",
       position: (36, 3),
      },
     ],
    },
    Function {
     argument: Some(
      "settings",
     ),
     arguments: FunctionArguments {
      arguments: [],
      ellipsis: false,
     },
     definition: BinaryOperation {
      operator: Update,
      operands: [
       Map {
        bindings: [
         KeyValue(
          AttributePath {
           attributes: [
            Raw {
             content: "backend",
             position: (36, 29),
            },
           ],
          },
          String {
           parts: [
            Raw {
             content: "btrfs-progs-sudo",
             position: (36, 40),
            },
           ],
          },
         ),
        ],
        recursive: false,
        position: (36, 27),
       },
       Variable {
        identifier: "settings",
        position: (36, 64),
       },
      ],
      position: (36, 61),
     },
     position: (36, 17),
    },
   ),
   KeyValue(
    AttributePath {
     attributes: [
      Raw {
       content: "mkConfigFile",
       position: (37, 3),
      },
     ],
    },
    Function {
     argument: Some(
      "settings",
     ),
     arguments: FunctionArguments {
      arguments: [],
      ellipsis: false,
     },
     definition: FunctionApplication {
      function: PropertyAccess {
       expression: Variable {
        identifier: "lib",
        position: (37, 28),
       },
       attribute_path: AttributePath {
        attributes: [
         Raw {
          content: "concatStringsSep",
          position: (37, 32),
         },
        ],
       },
       default: None,
      },
      arguments: [
       String {
        parts: [
         Raw {
          content: "\n",
          position: (37, 50),
         },
        ],
       },
       FunctionApplication {
        function: Variable {
         identifier: "attr2Lines",
         position: (37, 55),
        },
        arguments: [
         FunctionApplication {
          function: Variable {
           identifier: "addDefaults",
           position: (37, 67),
          },
          arguments: [
           Variable {
            identifier: "settings",
            position: (37, 79),
           },
          ],
         },
        ],
       },
      ],
     },
     position: (37, 18),
    },
   ),
   KeyValue(
    AttributePath {
     attributes: [
      Raw {
       content: "mkTestedConfigFile",
       position: (38, 3),
      },
     ],
    },
    Function {
     argument: Some(
      "name",
     ),
     arguments: FunctionArguments {
      arguments: [],
      ellipsis: false,
     },
     definition: Function {
      argument: Some(
       "settings",
      ),
      arguments: FunctionArguments {
       arguments: [],
       ellipsis: false,
      },
      definition: LetIn {
       bindings: [
        KeyValue(
         AttributePath {
          attributes: [
           Raw {
            content: "configFile",
            position: (40, 7),
           },
          ],
         },
         FunctionApplication {
          function: PropertyAccess {
           expression: Variable {
            identifier: "pkgs",
            position: (40, 20),
           },
           attribute_path: AttributePath {
            attributes: [
             Raw {
              content: "writeText",
              position: (40, 25),
             },
            ],
           },
           default: None,
          },
          arguments: [
           String {
            parts: [
             Raw {
              content: "btrbk-",
              position: (40, 36),
             },
             Expression {
              expression: Variable {
               identifier: "name",
               position: (40, 44),
              },
             },
             Raw {
              content: ".conf",
              position: (40, 49),
             },
            ],
           },
           FunctionApplication {
            function: Variable {
             identifier: "mkConfigFile",
             position: (40, 57),
            },
            arguments: [
             Variable {
              identifier: "settings",
              position: (40, 70),
             },
            ],
           },
          ],
         },
        ),
       ],
       target: FunctionApplication {
        function: PropertyAccess {
         expression: Variable {
          identifier: "pkgs",
          position: (42, 5),
         },
         attribute_path: AttributePath {
          attributes: [
           Raw {
            content: "runCommand",
            position: (42, 10),
           },
          ],
         },
         default: None,
        },
        arguments: [
         String {
          parts: [
           Raw {
            content: "btrbk-",
            position: (42, 22),
           },
           Expression {
            expression: Variable {
             identifier: "name",
             position: (42, 30),
            },
           },
           Raw {
            content: "-tested.conf",
            position: (42, 35),
           },
          ],
         },
         Map {
          bindings: [],
          recursive: false,
          position: (42, 49),
         },
         String {
          parts: [
           Raw {
            content: "mkdir foo\ncp ",
            position: (43, 1),
           },
           Expression {
            expression: Variable {
             identifier: "configFile",
             position: (44, 12),
            },
           },
           Raw {
            content: " $out\nif (set +o pipefail; ",
            position: (44, 23),
           },
           Expression {
            expression: PropertyAccess {
             expression: Variable {
              identifier: "pkgs",
              position: (45, 30),
             },
             attribute_path: AttributePath {
              attributes: [
               Raw {
                content: "btrbk",
                position: (45, 35),
               },
              ],
             },
             default: None,
            },
           },
           Raw {
            content: "/bin/btrbk -c $out ls foo 2>&1 | grep $out);\nthen\necho btrbk configuration is invalid\ncat $out\nexit 1\nfi;\n",
            position: (45, 41),
           },
          ],
         },
        ],
       },
       position: (39, 5),
      },
      position: (38, 30),
     },
     position: (38, 24),
    },
   ),
  ],
  target: Map {
   bindings: [
    KeyValue(
     AttributePath {
      attributes: [
       Raw {
        content: "options",
        position: (54, 3),
       },
      ],
     },
     Map {
      bindings: [
       KeyValue(
        AttributePath {
         attributes: [
          Raw {
           content: "services",
           position: (55, 5),
          },
          Raw {
           content: "btrbk",
           position: (55, 14),
          },
         ],
        },
        Map {
         bindings: [
          KeyValue(
           AttributePath {
            attributes: [
             Raw {
              content: "extraPackages",
              position: (56, 7),
             },
            ],
           },
           FunctionApplication {
            function: PropertyAccess {
             expression: Variable {
              identifier: "lib",
              position: (56, 23),
             },
             attribute_path: AttributePath {
              attributes: [
               Raw {
                content: "mkOption",
                position: (56, 27),
               },
              ],
             },
             default: None,
            },
            arguments: [
             Map {
              bindings: [
               KeyValue(
                AttributePath {
                 attributes: [
                  Raw {
                   content: "description",
                   position: (57, 9),
                  },
                 ],
                },
                String {
                 parts: [
                  Raw {
                   content: "Extra packages for btrbk, like compression utilities for <literal>stream_compress</literal>",
                   position: (57, 24),
                  },
                 ],
                },
               ),
               KeyValue(
                AttributePath {
                 attributes: [
                  Raw {
                   content: "type",
                   position: (58, 9),
                  },
                 ],
                },
                FunctionApplication {
                 function: PropertyAccess {
                  expression: Variable {
                   identifier: "lib",
                   position: (58, 16),
                  },
                  attribute_path: AttributePath {
                   attributes: [
                    Raw {
                     content: "types",
                     position: (58, 20),
                    },
                    Raw {
                     content: "listOf",
                     position: (58, 26),
                    },
                   ],
                  },
                  default: None,
                 },
                 arguments: [
                  PropertyAccess {
                   expression: Variable {
                    identifier: "lib",
                    position: (58, 33),
                   },
                   attribute_path: AttributePath {
                    attributes: [
                     Raw {
                      content: "types",
                      position: (58, 37),
                     },
                     Raw {
                      content: "package",
                      position: (58, 43),
                     },
                    ],
                   },
                   default: None,
                  },
                 ],
                },
               ),
               KeyValue(
                AttributePath {
                 attributes: [
                  Raw {
                   content: "default",
                   position: (59, 9),
                  },
                 ],
                },
                List {
                 elements: [],
                 position: (59, 19),
                },
               ),
               KeyValue(
                AttributePath {
                 attributes: [
                  Raw {
                   content: "example",
                   position: (60, 9),
                  },
                 ],
                },
                FunctionApplication {
                 function: PropertyAccess {
                  expression: Variable {
                   identifier: "lib",
                   position: (60, 19),
                  },
                  attribute_path: AttributePath {
                   attributes: [
                    Raw {
                     content: "literalExpression",
                     position: (60, 23),
                    },
                   ],
                  },
                  default: None,
                 },
                 arguments: [
                  String {
                   parts: [
                    Raw {
                     content: "[ pkgs.xz ]",
                     position: (60, 42),
                    },
                   ],
                  },
                 ],
                },
               ),
              ],
              recursive: false,
              position: (56, 36),
             },
            ],
           },
          ),
          KeyValue(
           AttributePath {
            attributes: [
             Raw {
              content: "niceness",
              position: (62, 7),
             },
            ],
           },
           FunctionApplication {
            function: PropertyAccess {
             expression: Variable {
              identifier: "lib",
              position: (62, 18),
             },
             attribute_path: AttributePath {
              attributes: [
               Raw {
                content: "mkOption",
                position: (62, 22),
               },
              ],
             },
             default: None,
            },
            arguments: [
             Map {
              bindings: [
               KeyValue(
                AttributePath {
                 attributes: [
                  Raw {
                   content: "description",
                   position: (63, 9),
                  },
                 ],
                },
                String {
                 parts: [
                  Raw {
                   content: "Niceness for local instances of btrbk. Also applies to remote ones connecting via ssh when positive.",
                   position: (63, 24),
                  },
                 ],
                },
               ),
               KeyValue(
                AttributePath {
                 attributes: [
                  Raw {
                   content: "type",
                   position: (64, 9),
                  },
                 ],
                },
                FunctionApplication {
                 function: PropertyAccess {
                  expression: Variable {
                   identifier: "lib",
                   position: (64, 16),
                  },
                  attribute_path: AttributePath {
                   attributes: [
                    Raw {
                     content: "types",
                     position: (64, 20),
                    },
                    Raw {
                     content: "ints",
                     position: (64, 26),
                    },
                    Raw {
                     content: "between",
                     position: (64, 31),
                    },
                   ],
                  },
                  default: None,
                 },
                 arguments: [
                  UnaryOperation {
                   operator: Negate,
                   operand: Int {
                    value: 20,
                    position: (64, 41),
                   },
                   position: (64, 40),
                  },
                  Int {
                   value: 19,
                   position: (64, 45),
                  },
                 ],
                },
               ),
               KeyValue(
                AttributePath {
                 attributes: [
                  Raw {
                   content: "default",
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