String id = event.getRequestContext().getRequestParameter(OBJECTID);
UIPageIterator pageIterator = uiUserInGroup.getChild(UIGridUser.class).getUIPageIterator();
int currentPage = pageIterator.getCurrentPage();
OrganizationService service = uiUserInGroup.getApplicationComponent(OrganizationService.class);
MembershipHandler handler = service.getMembershipHandler();
handler.removeMembership(id, true);
uiUserInGroup.refresh();
while (currentPage > pageIterator.getAvailablePage())
currentPage--;
pageIterator.setCurrentPage(currentPage);
event.getRequestContext().addUIComponentToUpdateByAjax(uiUserInGroup.getChild(UIGridUser.class));