syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"typing_env:"}]}
source_snippet:     typing_env: ty::TypingEnv<'tcx>,
context_before:     tcx: TyCtxt<'tcx>,
context_after: ) -> impl Fn(&Result<Ty<'tcx>, AlwaysRequiresDrop>) -> bool {