public function serialize($data, $format, SerializationContext $context = null)
{
if (!$this->serializationVisitors->containsKey($format)) {
throw new UnsupportedFormatException(sprintf('The format "%s" is not supported for serialization.', $format));
}
if (null === $context) {
$context = new SerializationContext();
}
$context->initialize($format, $visitor = $this->serializationVisitors->get($format)->get(), $this->navigator, $this->factory);
$visitor->setNavigator($this->navigator);
$this->navigator->accept($visitor->prepare($data), null, $context);
return $visitor->getResult();
}