If Open Sub
class IfOpenSub(val destinationCombinedId: CombinedId, _interfaceId: UShort, _type: UByte) : OutgoingGameMessage
If open-sub messages are used to open non-root interfaces on root interfaces.
Interface types:
| Id | Name | Is modal |
|:--:|:-------:|:--------:|
| 0 | Modal | Yes |
| 1 | Overlay | No |
| 3 | Client | Yes |Content copied to clipboard
Note: Client type is supported by the client, but is not actually in use by anything!