/**
  * @throws \ValidationException
  * @throws null
  */
 public function testCallback_SetOnAfterWriteCallback_CallbackCalled()
 {
     $dog = new Dog();
     $dog->Name = 'Jim bob';
     $owner = new Human();
     $owner->Name = 'Hilly Stewart';
     $owner->onAfterWriteCallback(function ($owner) use($dog) {
         $dog->OwnerID = $owner->ID;
         $dog->write();
     });
     $owner->write();
     $this->assertTrue($owner->exists());
     $this->assertTrue($dog->exists());
     $this->assertEquals(1, Human::get()->Count());
     $this->assertEquals(1, Dog::get()->Count());
     $this->assertEquals($owner->ID, $dog->OwnerID);
 }