code: private ContextUsersPanel getContextPanel(int contextId) {
  		ContextUsersPanel panel = this.userPanelsMap.get(contextId);
  		if (panel == null) {
  			panel = new ContextUsersPanel(this, contextId);
  			this.userPanelsMap.put(contextId, panel);
  		}
  		return panel;
  	}
docs: Gets the context panel for a given context.
  
  @param contextId the context id
  @return the context panel