{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"return"}]}
            return self.sig_of_closure_no_expectation(expr_def_id, decl, closure_kind);
        if expected_sig.sig.c_variadic() != decl.c_variadic {
        } else if expected_sig.sig.skip_binder().inputs_and_output.len() != decl.inputs.len() + 1 {