- DOCUMENT@0..35
    - INTERFACE_TYPE_EXTENSION@0..35
        - extend_KW@0..6 "extend"
        - WHITESPACE@6..7 " "
        - interface_KW@7..16 "interface"
        - WHITESPACE@16..17 " "
        - FIELDS_DEFINITION@17..35
            - L_CURLY@17..18 "{"
            - WHITESPACE@18..23 "\n    "
            - FIELD_DEFINITION@23..33
                - NAME@23..28
                    - IDENT@23..28 "value"
                - COLON@28..29 ":"
                - WHITESPACE@29..30 " "
                - NAMED_TYPE@30..33
                    - NAME@30..33
                        - IDENT@30..33 "Int"
            - WHITESPACE@33..34 "\n"
            - R_CURLY@34..35 "}"
- ERROR@17:18 "expected a Name" {
recursion limit: 500, high: 0