### Question:
L4Classifier extends Classifier { @Override public ClassifierDefinitionId getId() { return L4ClassifierDefinition.ID; } L4Classifier(Classifier parent); @Override ClassifierDefinitionId getId(); @Override ClassifierDefinition getClassifierDefinition(); @Override List<SupportedParameterValues> getSupportedParameterValues();  }### Answer:
@Test public void testGetId() { assertEquals(L4ClassifierDefinition.ID, l4Cl.getId()); }