# roomId property Null safety

String roomId
read / write

`roomId` of the `userId` that engages in mixtranscoding. The `null` value indicates the current room

## Implementation

    String roomId;

1. tencent_trtc_cloud
2. trtc_cloud_def
3. TRTCMixUser
4. roomId property

##### TRTCMixUser class

1. Constructors
2. TRTCMixUser
3. Properties
4. hashCode
5. height
6. inputType
7. pureAudio
8. roomId
9. runtimeType
10. streamType
11. userId
12. width
13. x
14. y
15. zOrder
16. Methods
17. noSuchMethod
18. toJson
19. toString
20. Operators
21. operator ==