$redis public property
The Redis yii\redis\Connection object or the application component ID of the Redis yii\redis\Connection. This can also be an array that is used to create a redis yii\redis\Connection instance in case you do not want do configure redis connection as an application component. After the Cache object is created, if you want to change this property, you should only assign it with a Redis yii\redis\Connection object.
public yii\redis\Connection|string|array $redis = 'redis'
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