Function rustc_query_impl::make_query::check_mod_unstable_api_usage

pub fn check_mod_unstable_api_usage<'tcx>(
    tcx: QueryCtxt<'tcx>, 
    key: check_mod_unstable_api_usage<'tcx>
) -> QueryStackFrame

[query description - consider adding a doc-comment!] checking for unstable API usage in describe_as_module(key, tcx)