set
public abstract void setOfflineMessageDuration(int duration, RongIMClient.ResultCallback<Long> callback)
Sets the storage duration of offline messages on the server (in days).
Note: This feature requires the customer to submit a ticket. The client-side method will only take effect after the feature is enabled on the server.
Parameters
duration
The compensation duration for offline messages, ranging from 1 to 7 days.
callback
The callback function