{"ast_node_type":"function","tokens":[{"end":57,"kind":"keyword","start":0,"text":"pub"}]}
pub fn check_unused_or_stable_features(tcx: TyCtxt<'_>) {
// This is `pub` for rustdoc. rustc should call it through `check_mod_unstable_api_usage`.
    let _prof_timer = tcx.sess.timer("unused_lib_feature_checking");