original_string: public function has(string $key): bool
      {
          $result = $this->iterateConfig($key);
  
          return !($result === null);
      }
code: public function has(string $key): bool
      {
          $result = $this->iterateConfig($key);
  
          return !($result === null);
      }
code_tokens: public function has ( string $ key ) : bool { $ result = $ this -> iterateConfig ( $ key ) ; return ! ( $ result === null ) ; }
docstring: Return of givent key is present.
  
  @param  string $key
  @return boolean
docstring_tokens: Return of givent key is present .