PersistenceProviderAdaptor persistenceProviderAdaptor=null;
Module module = moduleLoader.loadModule(ModuleIdentifier.fromString(adapterModule));
final ServiceLoader<PersistenceProviderAdaptor> serviceLoader =
module.loadService(PersistenceProviderAdaptor.class);
if (serviceLoader != null) {
for (PersistenceProviderAdaptor adaptor : serviceLoader) {
if (persistenceProviderAdaptor != null) {
throw MESSAGES.multipleAdapters(adapterModule);
}