syntax_data: {"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"syntax_context_data:"}]}
source_snippet:     syntax_context_data: Vec<SyntaxContextData>,
context_before:     expn_hash_to_expn_id: UnhashMap<ExpnHash, ExpnId>,
context_after:     syntax_context_map: FxHashMap<SyntaxContextKey, SyntaxContext>,