{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"[self_ty].into_iter().chain(sig.tupled_inputs_ty.tuple_fields()),"}]}
            [self_ty].into_iter().chain(sig.tupled_inputs_ty.tuple_fields()),
        tcx.mk_fn_sig(
            sig.to_coroutine_given_kind_and_upvars(