@Override
public void cacheManagerStarting(GlobalComponentRegistry gcr, GlobalConfiguration globalCfg) {
Map<Integer, AdvancedExternalizer<?>> externalizerMap = globalCfg.serialization().advancedExternalizers();
externalizerMap.put(ExternalizerIds.PROTOBUF_VALUE_WRAPPER, new ProtobufValueWrapper.Externalizer());
externalizerMap.put(ExternalizerIds.PROTOBUF_FILE_DESCRIPTOR_SRC, new FileDescriptorSourceExternalizer());
}