@Test
public void test_replaceExtension_Adaptive() throws Exception {
ExtensionLoader<AddExt3> loader = ExtensionLoader.getExtensionLoader(AddExt3.class);
AddExt3 adaptive = loader.getAdaptiveExtension();
assertFalse(adaptive instanceof AddExt3_ManualAdaptive);
loader.replaceExtension(null, AddExt3_ManualAdaptive.class);
adaptive = loader.getAdaptiveExtension();