original_string: public function has($name)
      {
          $checker = $this->_classes['checker'];
          return isset($this->_handlers[$name]) || $checker::has($name);
      }
code: public function has($name)
      {
          $checker = $this->_classes['checker'];
          return isset($this->_handlers[$name]) || $checker::has($name);
      }
code_tokens: public function has ( $ name ) { $ checker = $ this -> _classes [ 'checker' ] ; return isset ( $ this -> _handlers [ $ name ] ) || $ checker :: has ( $ name ) ; }
docstring: Checks if a validation handler exists.
  
  @param string $name A validation handler name.
docstring_tokens: Checks if a validation handler exists .