anchor.diff:      boolean cancel = request.getParameter("cancel") != null;
       String users = ParamUtils.getParameter(request, "users");
       String [] adminIDs = ParamUtils.getParameters(request, "admin");
  -    String [] oldAdminIDs = ParamUtils.getParameters(request, "oldAdmin");
       String [] deleteMembers = ParamUtils.getParameters(request, "delete");
       String groupName = ParamUtils.getParameter(request, "group");
       GroupManager groupManager = webManager.getGroupManager();
  
positive.code:                     if (groupDisplayName != null) {
                          group.getProperties().put("sharedRoster.displayName", groupDisplayName);
                      }
                      group.getProperties().put("sharedRoster.groupList", toList(groupNames));
                  }
                  else {
                      group.getProperties().put("sharedRoster.showInRoster", "nobody");
  
negative.code:     String newShowInRosterType = ParamUtils.getParameter(request, "newShow");
      boolean newShowInRoster = "onlyGroup".equals(newShowInRosterType) || "everybody".equals(newShowInRosterType);
      String  newDisplayName = ParamUtils.getParameter(request, "newDisplay");
      boolean groupInfoChanged = ParamUtils.getBooleanParameter(request, "groupChanged", false);
  
      boolean enableRosterGroups = ParamUtils.getBooleanParameter(request,"enableRosterGroups");
  