The origin of the flow that user originated from.
public static Origin values()
public static Origin valueOf(String name)
The user clicked on a reply link in Messenger to a particular message.
public static final Origin REPLY_FLOW
The user clicked an app shortcut in Messenger.
public static final Origin COMPOSE_FLOW
The user came from a flow that was not known at the time this code was written.
public static final Origin UNKNOWN