syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"self.tcx.mk_args(&[yield_ty.into()]),"}]}
source_snippet:                             self.tcx.mk_args(&[yield_ty.into()]),
context_before:                             self.tcx.require_lang_item(LangItem::AsyncGenFinished, body.span),
context_after:                         ),