original_string: protected function addParam($key, $value = null)
  	{
  		if (is_null($value))
  		{
  			$this->params[] = $key;
  		}
  		else
  		{
  			$this->params[$key] = $value;
  		}
  
  	}
code: protected function addParam($key, $value = null)
  	{
  		if (is_null($value))
  		{
  			$this->params[] = $key;
  		}
  		else
  		{
  			$this->params[$key] = $value;
  		}
  
  	}
code_tokens: protected function addParam ( $ key , $ value = null ) { if ( is_null ( $ value ) ) { $ this -> params [ ] = $ key ; } else { $ this -> params [ $ key ] = $ value ; } }
docstring: Adds a wkhtmltopdf parameter
  
  @param string $key
  @param string $value
docstring_tokens: Adds a wkhtmltopdf parameter