syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"field_names.get_or_insert_with(saved_local,"}]}
source_snippet:         field_names.get_or_insert_with(saved_local, || var.name);
context_before:         let saved_local = variant_fields[variant][field];
context_after:     }