Unirest\Request::defaultHeader PHP Method

    public static function defaultHeader($name, $value)
    {
        return self::$defaultHeaders[$name] = $value;
    }

 /**
  * @param \Codecasts\Restinga\Contracts\Data\Resource $resource
  * @param bool                                        $identified
  */
 public function __construct(Resource $resource, $identified = false)
 {
     $this->resource = $resource;
     $this->identified = $identified;
     $this->descriptor = $this->resource->getDescriptor();
     $this->request = new Unirest\Request();
     $this->request = $this->descriptor->authorization()->setupRequest($this->request);
     $this->request->defaultHeader('Content-Type', $this->resource->getContentTypeHeader());
     $this->request->defaultHeader('Accept', $this->resource->getAcceptHeader());
 }