public function init()
{
if ($this->dataProvider === null) {
throw new InvalidConfigException('The "dataProvider" property must be set.');
}
if ($this->emptyText === null) {
$this->emptyText = Yii::t('yii', 'No results found.');
}
if (!isset($this->options['id'])) {
$this->options['id'] = $this->getId();
}
}