original_string: public function getQueryParameter($name)
      {
          return isset($this->query[$name]) ? $this->query[$name] : null;
      }
code: public function getQueryParameter($name)
      {
          return isset($this->query[$name]) ? $this->query[$name] : null;
      }
code_tokens: public function getQueryParameter ( $ name ) { return isset ( $ this -> query [ $ name ] ) ? $ this -> query [ $ name ] : null ; }
docstring: Retrieve the value of a query parameter.
  
  @param string $name The name of the query parameter.
  
  @return string|null
docstring_tokens: Retrieve the value of a query parameter .