yii2 arraydataprovider

1$query = new Query;
2$provider = new ArrayDataProvider([
3    'allModels' => $query->from('post')->all(),
4    'sort' => [
5        'attributes' => ['id', 'username', 'email'],
6    ],
7    'pagination' => [
8        'pageSize' => 10,
9    ],
10]);
11// get the posts in the current page
12$posts = $provider->getModels();
13