syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"expn_data_disambiguators:"}]}
source_snippet:             expn_data_disambiguators: UnhashMap::default(),
context_before:             syntax_context_map: iter::once((root_ctxt_data.key(), SyntaxContext(0))).collect(),
context_after:         }