original_string: protected function modelExists()
      {
          $model = $this->option('model');
  
          if (empty($model)) {
              return true;
          }
  
          return class_exists($model) && is_subclass_of($model, Model::class);
      }
code: protected function modelExists()
      {
          $model = $this->option('model');
  
          if (empty($model)) {
              return true;
          }
  
          return class_exists($model) && is_subclass_of($model, Model::class);
      }
code_tokens: protected function modelExists ( ) { $ model = $ this -> option ( 'model' ) ; if ( empty ( $ model ) ) { return true ; } return class_exists ( $ model ) && is_subclass_of ( $ model , Model :: class ) ; }
docstring: Determine if the model is exists.
  
  @return bool
docstring_tokens: Determine if the model is exists .