Interface that represents a participant of the conversation (see Conversation.participants. The default permissions for all participants are: write / edit / remove their own messages.
True if a user is an owner of the conversation. There can be more than one owner in the conversation. An owner can edit the conversation and has all other permissions.
The sequence of the message event that was marked as last read by this user in the conversation. Participants mark events as read via Conversation.markAsRead. Is '0' if the participant hasn't marked any event as read.
Messaging user id.