syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"self.record_arg(source_map.span_to_embeddable_string(span));"}]}
source_snippet:         self.record_arg(source_map.span_to_embeddable_string(span));
context_before:         self.record_arg(event_arg);
context_after:     }