/**
  * Gets header value. Convenience method - you can get header bag and get header from there
  *
  * @param string       $header
  * @param string|array $default
  * @param boolean      $first
  *
  * @return string|array
  */
 public function getHeader($header, $default = null, $first = true)
 {
     return $this->headers->getHeader($header, $default, $first);
 }
 /**
  * Gets formatted headers. Convenience function - you can get header bag and get them from there
  *
  * @return array
  */
 public function getFormattedHeaders()
 {
     return $this->headers->getFormattedHeaders();
 }