private function getValidator($model = null)
    {
        if ($this->_validator === null) {
            $this->_validator = $this->createEmbeddedValidator($model);
        }

        return $this->_validator;
    }
private function getValidator($model = null)
    {
        if ($this->_validator === null) {
            $this->_validator = $this->createEmbeddedValidator($model);
        }

        return $this->_validator;
    }
Returns the validator declared in [[rule]].
@param Model|null $model model in which context validator should be created.
@return Validator the declared validator.