original_string: public function addHeaderToRequest($header, $value)
      {
          $this->request = $this->request->withHeader($header, $value);
      }
code: public function addHeaderToRequest($header, $value)
      {
          $this->request = $this->request->withHeader($header, $value);
      }
code_tokens: public function addHeaderToRequest ( $ header , $ value ) { $ this -> request = $ this -> request -> withHeader ( $ header , $ value ) ; }
docstring: Add a header to the request.
  
  @param string $header
  @param string|string[] $value
docstring_tokens: Add a header to the request .