synchronized (this.sidCache) {
            try (DcerpcHandle handle = DcerpcHandle.getHandle("ncacn_np:" + authorityServerName + "[\\PIPE\\samr]", tc)) {
                final samr.SamrSamArray sam = new samr.SamrSamArray();
                try (SamrPolicyHandle policyHandle = new SamrPolicyHandle(handle, authorityServerName, 0x02000000);

        DcerpcHandle handle = null;
        SamrPolicyHandle policyHandle = null;
        SamrDomainHandle domainHandle = null;
        final samr.SamrSamArray sam = new samr.SamrSamArray();
        MsrpcEnumerateAliasesInDomain rpc;

        synchronized (sid_cache) {
            try {