syntax_data: {"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"typing_env:"}]}
source_snippet:     typing_env: TypingEnv<'tcx>,
context_before:     local_decls: &'a mut LocalDecls<'tcx>,
context_after:     enums: Vec<EnumCheckType<'tcx>>,