assertEquals(1, t4.firstEntity().joins_secondEntity().size());
assertEquals(1, t4.firstEntity().joins_secondEntity_firstEntities().size());
// problematic parts
assertEquals(1, t4.firstEntity_joins().size());
assertEquals(1, t4.firstEntity_joins_secondEntity().size());
assertEquals(1, t4.firstEntity_joins_secondEntity_firstEntities().size());
}