{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"dbg_fmt.field_with(\"tokens\","}]}
            dbg_fmt.field_with("tokens", |field| field.debug_list().entries(tokens).finish());
            }
            dbg_fmt.field("approx_token_stream_pos", &self.num_bump_calls);