nssArena_Destroy(hash->arena);
if (hash->arena) { nssArena_Destroy(hash->arena); } else { nss_ZFreeIf(hash); }
nssHash_Destroy(  nssHash *hash){  (void)PZ_DestroyLock(hash->mutex);  PL_HashTableDestroy(hash->plHashTable);  nssArena_Destroy(hash->arena);}