{"ast_node_type":"variable","tokens":[{"end":70,"kind":"keyword","start":0,"text":"let"}]}
                let typeck_results = self.fcx.typeck_results.borrow();
            hir::PatKind::Binding(..) => {
                let bm = typeck_results.extract_binding_mode(self.tcx().sess, p.hir_id, p.span);