public function testDenormalizationLink()
 {
     $this->assertFalse($this->attributeMetadata->isDenormalizationLink());
     $newAttributeMetadata = $this->attributeMetadata->withDenormalizationLink(true);
     $this->assertTrue($newAttributeMetadata->isDenormalizationLink());
     $this->assertNotEquals($this->attributeMetadata, $newAttributeMetadata);
 }