ChannelStaticData conveys configuration and context information to an IChannel. It is the argument passed to an IChannel on the setStaticData() method call.
getChannelSubscribeId()
getChannelSubscribeId() returns the id of that channel in that user's layout. Every channel in their layout has an id unique within that layout for that user. It will always be the same for the same channel instance in that user's layout regardless of the session or channel implementation class.