syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"self.tcx().require_lang_item(LangItem::Sized,"}]}
source_snippet:             self.tcx().require_lang_item(LangItem::Sized, cause.span),
context_before:             self.tcx(),
context_after:             [output_ty],