- DOCUMENT@0..60
    - OPERATION_DEFINITION@0..60
        - OPERATION_TYPE@0..6
            - query_KW@0..5 "query"
            - WHITESPACE@5..6 " "
        - VARIABLE_DEFINITIONS@6..23
            - L_PAREN@6..7 "("
            - VARIABLE_DEFINITION@7..21
                - VARIABLE@7..14
                    - DOLLAR@7..8 "$"
                    - NAME@8..14
                        - IDENT@8..14 "height"
                - COLON@14..15 ":"
                - WHITESPACE@15..16 " "
                - LIST_TYPE@16..21
                    - L_BRACK@16..17 "["
                    - NAMED_TYPE@17..20
                        - NAME@17..20
                            - IDENT@17..20 "Int"
                    - R_BRACK@20..21 "]"
            - R_PAREN@21..22 ")"
            - WHITESPACE@22..23 " "
        - SELECTION_SET@23..60
            - L_CURLY@23..24 "{"
            - WHITESPACE@24..29 "\n    "
            - FIELD@29..36
                - NAME@29..36
                    - IDENT@29..31 "id"
                    - WHITESPACE@31..36 "\n    "
            - FIELD@36..59
                - NAME@36..41
                    - IDENT@36..41 "trees"
                - ARGUMENTS@41..59
                    - L_PAREN@41..42 "("
                    - ARGUMENT@42..57
                        - NAME@42..48
                            - IDENT@42..48 "height"
                        - COLON@48..49 ":"
                        - WHITESPACE@49..50 " "
                        - VARIABLE@50..57
                            - DOLLAR@50..51 "$"
                            - NAME@51..57
                                - IDENT@51..57 "height"
                    - R_PAREN@57..58 ")"
                    - WHITESPACE@58..59 "\n"
            - R_CURLY@59..60 "}"
