{"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"typing_env:"}]}
    typing_env: ty::TypingEnv<'tcx>,
    typeck_results: &'a ty::TypeckResults<'tcx>,
    closure_min_captures: Option<&'tcx RootVariableMinCaptureList<'tcx>>,