/**
  * Adds the configurations for data stores whose entities will be mapped using the engine created
  * by this class.
  *
  * @param dataStores configurations of data stores that will have their entities mapped through
  *     this engine.
  */
 public final void addDataStoreConfigurations(DataStoreConfiguration... dataStores) {
   Args.notEmpty(dataStores, "Data stores");
   for (DataStoreConfiguration config : dataStores) {
     Args.notNull(config, "Data store configuration");
     dataStoreConfigurations.add(config);
   }
 }
 /**
  * Adds instances of {@link CustomDataStoreFactory} that should be used by uniVocity to read any
  * custom {@link DataStoreConfiguration}, provided by the user in the constructor of this class,
  * to properly create instances of {@link CustomDataStore}.
  *
  * @param customFactories the factories that process user-provided data store configurations and
  *     generate custom data store instances.
  */
 public final void addCustomDataStoreFactories(CustomDataStoreFactory<?>... customFactories) {
   Args.notEmpty(customFactories, "Custom data store factories");
   for (CustomDataStoreFactory<?> customFactory : customFactories) {
     Args.notNull(customFactory, "Custom data store factory");
     customDataStoreFactories.add(customFactory);
   }
 }