src/test/java/org/dataloader/fixtures/parameterized/TestDataLoaderFactory.java Added unwrap() method to support loader delegation src/test/java/org/dataloader/fixtures/parameterized/TestDataLoaderFactories.java Extended tests to run via delegating DataLoader factories src/test/java/org/dataloader/fixtures/parameterized/DelegatingDataLoaderFactory.java New class implementing a delegating DataLoader factory src/test/java/org/dataloader/DelegatingDataLoaderTest.java Added tests to verify unwrapping and delegation behavior src/test/java/org/dataloader/DataLoaderTest.java Updated type-check conditions to use unwrap() src/main/java/org/dataloader/DelegatingDataLoader.java Introduced a delegating wrapper for DataLoader src/main/java/org/dataloader/DataLoader.java Added parameter annotations and a null check in load()