Illuminate\Database\Eloquent\Model::getHidden PHP Method

    public function getHidden()
    {
        return $this->hidden;
    }

 /**
  * Create new instance of eloquent type.
  *
  * @param Model $model
  */
 public function __construct(Model $model, $name = '')
 {
     $this->name = $name;
     $this->fields = collect();
     $this->hiddenFields = collect($model->getHidden())->flip();
     $this->model = $model;
     $this->camelCase = config('relay.camel_case', false);
 }