* FINERACT-2421: Add unit tests for ExternalIdFactory * FINERACT-2421: Fix ambiguous method reference in ExternalIdFactoryTest Cast null to String to resolve ambiguous method call between produce(String) and produce(List<String>) overloads.
* FINERACT-2421: Add unit tests for ExternalIdFactory * FINERACT-2421: Fix ambiguous method reference in ExternalIdFactoryTest Cast null to String to resolve ambiguous method call between produce(String) and produce(List<String>) overloads.