- DOCUMENT@0..20
    - INTERFACE_TYPE_DEFINITION@0..20
        - interface_KW@0..9 "interface"
        - WHITESPACE@9..10 " "
        - NAME@10..16
            - IDENT@10..16 "Person"
        - WHITESPACE@16..17 " "
        - FIELDS_DEFINITION@17..20
            - L_CURLY@17..18 "{"
            - WHITESPACE@18..19 "\n"
            - R_CURLY@19..20 "}"
- ERROR@19:20 "expected Field Definition" }
recursion limit: 500, high: 0