function testSaveLoadAggrigatedObjectWithShortDefinition()
 {
     $extra = new ExtraForAggregateTest();
     $extra->setExtra('value');
     $photo = new PhotoForTest();
     $photo->setExtra($extra);
     $photo->save();
     $photo2 = lmbActiveRecord::findById('PhotoForTest', $photo->getId());
     $this->assertIsA($photo2->getExtra(), 'ExtraForAggregateTest');
     $this->assertEqual($photo2->getExtra()->getValue(), 'value_as_extra_value');
 }