public function testResolveReference()
 {
     $array = array('a' => array('b' => array('c' => array('d' => 123))));
     $object = new ArrayObject($array);
     $this->assertEquals(123, $this->loader->resolveReference('a.b.c.d', $array));
     $this->assertEquals(123, $this->loader->resolveReference('a.b.c.d', $object));
 }