- DOCUMENT@0..25
    - UNION_TYPE_EXTENSION@0..25
        - extend_KW@0..6 "extend"
        - WHITESPACE@6..7 " "
        - union_KW@7..12 "union"
        - WHITESPACE@12..13 " "
        - NAME@13..25
            - IDENT@13..25 "SearchResult"
- ERROR@25:25 "expected Directives or Union Member Types" EOF
recursion limit: 500, high: 0