original_string: protected function callbackAllowsGuests($callback)
      {
          $parameters = (new ReflectionFunction($callback))->getParameters();
  
          return isset($parameters[0]) && $this->parameterAllowsGuests($parameters[0]);
      }
code: protected function callbackAllowsGuests($callback)
      {
          $parameters = (new ReflectionFunction($callback))->getParameters();
  
          return isset($parameters[0]) && $this->parameterAllowsGuests($parameters[0]);
      }
code_tokens: protected function callbackAllowsGuests ( $ callback ) { $ parameters = ( new ReflectionFunction ( $ callback ) ) -> getParameters ( ) ; return isset ( $ parameters [ 0 ] ) && $ this -> parameterAllowsGuests ( $ parameters [ 0 ] ) ; }
docstring: Determine if the callback allows guests.
  
  @param  callable  $callback
  @return bool
docstring_tokens: Determine if the callback allows guests .