PresenceType
        
        Description:
        public enum PresenceType
        
        
          The possible presence states an object implementing PresenceDetails could be 
            in.
          These closely follow the 
            
              SimplePresence interface in the Telepathy specification.
         
        
        
        Content:
        Enum values:
        
          - AVAILABLE - available
- AWAY - away from keyboard
- BUSY - at keyboard, but too busy to chat
            
- ERROR - an error occurred with fetching 
              the presence
- EXTENDED_AWAY - away from keyboard
              for an extended period of time
- HIDDEN - also known as "invisible" or 
              "appear offline"
- OFFLINE - offline
- UNKNOWN - presence not received from 
              server
- UNSET - never set