{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":".collect::<Result<Vec<_>,"}]}
                    .collect::<Result<Vec<_>, _>>()
                    .map(|e| tcx.sess.source_map().span_to_snippet(e.span))
                    .map(|a| a.join(", ")),