public IParticipant getViewer(){
IPersistenceManager persistenceManager = PersistenceManagerFactory.getPersistenceManager();
Map<String, Object> map = new HashMap<String, Object>();
map.put("sharedDataKey", this.sharedDataKey);//$NON-NLS-1$
map.put("participantId", this.widgetInstance.getUserId());//$NON-NLS-1$
IParticipant [] participants = persistenceManager.findByValues(IParticipant.class, map);
if(participants != null && participants.length == 1) return participants[0];
return null;
}
/**