### Question:
OfOverlayAug implements EpRendererAugmentation, AutoCloseable { @Override public Map.Entry<Class<? extends Augmentation<EndpointL3Prefix>>, Augmentation<EndpointL3Prefix>> buildL3PrefixEndpointAugmentation( RegisterL3PrefixEndpointInput input) { return null; } OfOverlayAug(DataBroker dataProvider, EpRendererAugmentationRegistry epRendererAugmentationRegistry); @Override Map.Entry<Class<? extends Augmentation<Endpoint>>, Augmentation<Endpoint>> buildEndpointAugmentation(
            RegisterEndpointInput input); @Override Map.Entry<Class<? extends Augmentation<EndpointL3>>, Augmentation<EndpointL3>> buildEndpointL3Augmentation(
            RegisterEndpointInput input); @Override Map.Entry<Class<? extends Augmentation<EndpointL3Prefix>>, Augmentation<EndpointL3Prefix>> buildL3PrefixEndpointAugmentation(
            RegisterL3PrefixEndpointInput input); @Override void close();  }### Answer:
@Test public void testBuildL3PrefixEndpointAugmentation() { RegisterL3PrefixEndpointInput input = new RegisterL3PrefixEndpointInputBuilder().build(); Map.Entry<Class<? extends Augmentation<EndpointL3Prefix>>, Augmentation<EndpointL3Prefix>> entry = ofOverlayAug.buildL3PrefixEndpointAugmentation(input); assertNull(entry); }