### Question:
IncludedModelsIndex { public void clear() { index.clear(); }  void index(final BaseIncludedModelActiveRecord includedModel,
                      final Import anImport); Import getImport(final BaseIncludedModelActiveRecord includedModel); Collection<Import> getIndexedImports(); void clear();  }### Answer:
@Test public void testClear() { assertEquals(1, modelsIndex.size()); modelsIndex.clear(); assertEquals(0, modelsIndex.size()); }