{"ast_node_type":"variable","tokens":[{"end":77,"kind":"keyword","start":0,"text":"let"}]}
                    let possible_rcvr_ty = self.node_ty_opt(binding.hir_id)?;
                let possible_rcvr_ty = expr_finder.uses.iter().rev().find_map(|binding| {
                    if possible_rcvr_ty.is_ty_var() {