this.user = user;
}
public void execute() {
popup.hide();
final EditGroupsForUserPanel editGroupsForUserPanel = new EditGroupsForUserPanel(null, null, null, user);
final PromptDialogBox editGroupDialogBox = new PromptDialogBox("Join/Leave Groups", "OK", null, null, false, true);
editGroupDialogBox.setContent(editGroupsForUserPanel);
editGroupDialogBox.center();
}