{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"RUST_2021_PREFIXES_INCOMPATIBLE_SYNTAX,"}]}
        RUST_2021_PREFIXES_INCOMPATIBLE_SYNTAX,
        RUST_2021_INCOMPATIBLE_OR_PATTERNS,
        RUST_2021_PRELUDE_COLLISIONS,