Called after the #send method of the LinphoneChatMessage was called.
The message will be in state InProgress. In case of resend this callback won't be called.
public delegate void OnMessageSentDelegate(Core core, ChatRoom chatRoom, ChatMessage message);
LinphoneChatRoom involved in this conversation. Can be be created by the framework in case the From-URI is not present in any chat room.
LinphoneChatMessage outgoing message