public function testVirtualVersions()
 {
     $this->serializer->setVersion(2);
     $this->assertEquals($this->getContent('virtual_properties_low'), $this->serializer->serialize(new ObjectWithVersionedVirtualProperties(), $this->getFormat()));
     $this->serializer->setVersion(7);
     $this->assertEquals($this->getContent('virtual_properties_all'), $this->serializer->serialize(new ObjectWithVersionedVirtualProperties(), $this->getFormat()));
     $this->serializer->setVersion(9);
     $this->assertEquals($this->getContent('virtual_properties_high'), $this->serializer->serialize(new ObjectWithVersionedVirtualProperties(), $this->getFormat()));
 }