protected function getFilePath()
    {
        $fileName = trim($this->fileName);
        if (!strlen($fileName)) {
            throw new SystemException('The form model file name is not set.');
        }

        $fileName = $this->addExtension($fileName);

        return $this->getPluginCodeObj()->toPluginDirectoryPath().'/models/'.strtolower($this->getModelClassName()).'/'.$fileName;
    }