{"ast_node_type":"variable","tokens":[{"end":44,"kind":"keyword","start":0,"text":"let"}]}
        let (awaitee_pat, awaitee_pat_hid) =
        let awaitee_ident = Ident::with_dummy_span(sym::__awaitee);
            self.pat_ident_binding_mode(gen_future_span, awaitee_ident, hir::BindingMode::MUT);