{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":".extract_binding_mode(tcx.sess,"}]}
                        .extract_binding_mode(tcx.sess, pat.hir_id, pat.span);
                        .typeck_results()
                    debug!("walk_pat: pat.hir_id={:?} bm={:?}", pat.hir_id, bm);