Neomerx\JsonApi\Contracts\Http\Headers\HeaderParametersInterface::getContentTypeHeader PHP Метод

    public function getContentTypeHeader();

 /**
  * @param HeaderParametersInterface $parameters
  *
  * @return void
  */
 protected function checkContentTypeHeader(HeaderParametersInterface $parameters)
 {
     // Do not allow specify more than 1 media type for input data. Otherwise which one is correct?
     if (count($parameters->getContentTypeHeader()->getMediaTypes()) > 1) {
         throw new E([], E::HTTP_CODE_BAD_REQUEST);
     }
     $this->codecMatcher->matchDecoder($parameters->getContentTypeHeader());
     // From spec: Servers MUST respond with a 415 Unsupported Media Type status code
     // if a request specifies the header Content-Type: application/vnd.api+json with
     // any media type parameters.
     // We return 415 if no match found for decoder (media type with or wo parameters)
     // If no decoders were configured for media types with parameters we return 415 anyway
     if ($this->codecMatcher->getDecoderHeaderMatchedType() === null) {
         throw new E([], E::HTTP_CODE_UNSUPPORTED_MEDIA_TYPE);
     }
 }