{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
        let FnAbiGcc { return_type, arguments_type, is_c_variadic, on_stack_param_indices, .. } =
        // FIXME(antoyo): Should we do something with `FnAbiGcc::fn_attributes`?
            self.gcc_type(cx);