syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"syntax_context_map:"}]}
source_snippet:     syntax_context_map: FxHashMap<SyntaxContextKey, SyntaxContext>,
context_before:     syntax_context_data: Vec<SyntaxContextData>,
context_after:     /// Maps the `local_hash` of an `ExpnData` to the next disambiguator value.