syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"Ty::new_adt(tcx,"}]}
source_snippet:                 Ty::new_adt(tcx, poll_adt_ref, poll_args)
context_before:                 let poll_args = tcx.mk_args(&[old_ret_ty.into()]);
context_after:             }