### Question:
GraphEntityMutation implements Entity.Mutation { @Override public Mutation deleteAttributes(Attribute.Family namespace) { return this; } GraphEntityMutation(Entity entity,
            OperationPipeline assemblyLine,
            BatchMutation batchMutation); @Override ValueSpecifier<Mutation> withAttribute(Name name); @Override Mutation deleteAttribute(Name name); @Override Mutation deleteAttributes(Attribute.Family namespace); @Override Mutation delete(); @Override com.intuit.ugc.api.BatchMutation ready();  }### Answer:
@Test public void testDeleteAttributes(){ GraphEntityMutation graphEntityMutation = createGraphEntityMutation(null); Mutation deleteAttribute = graphEntityMutation .deleteAttributes(TartanImplTestConstants.ATTR_DUMMY_FAMILY); assertNotNull(deleteAttribute); }