public function validateAttribute($model, $attribute)
    {
        if ($this->range instanceof \Closure) {
            $this->range = call_user_func($this->range, $model, $attribute);
        }
        parent::validateAttribute($model, $attribute);
    }
public function validateAttribute($model, $attribute)
    {
        if ($this->range instanceof \Closure) {
            $this->range = call_user_func($this->range, $model, $attribute);
        }
        parent::validateAttribute($model, $attribute);
    }
{@inheritdoc}