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:     local_decls: &'a mut LocalDecls<'tcx>,
context_after:     pointers: Vec<(Place<'tcx>, Ty<'tcx>, PlaceContext)>,