MessageListTongueType
Introduction
The type of the Dynamic Tongue on the bottom of the message list. 
Parameter introduction
| Enumeration name | Enumeration type | value |
|---|---|---|
| none | Do not show the Dynamic Tongue. | 0 |
| toLatest | Go back to bottom of the message list. | 1 |
| showUnread | Show the amount of the unread messages and go down bottom to show them. | 2 |
| atMe | Indicates the messages mentioned us. | 3 |
| atAll | Indicates the messages mentioned all. | 4 |