public DataSetProviderRegistry getDataSetProviderRegistry() { if (dataSetProviderRegistry == null) { dataSetProviderRegistry = new DataSetProviderRegistryImpl(); dataSetProviderRegistry.registerDataProvider(checkNotNull(getStaticDataSetProvider(), STATIC_DATA_SET_PROVIDER)); dataSetProviderRegistry.registerDataProvider(checkNotNull(getBeanDataSetProvider(), "BeanDataSetProvider")); } return dataSetProviderRegistry; }