{"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"//"}]}
    // an error would be reported if this fails.
pub(super) fn check_on_unimplemented(tcx: TyCtxt<'_>, def_id: LocalDefId) {
    let _ = OnUnimplementedDirective::of_item(tcx, def_id.to_def_id());