protected void onSubmitInternal(final AjaxRequestTarget target, final Form<?> form) {
final MembershipCond membershipCond = new MembershipCond();
membershipCond.setRoleName(selectedNode.getName());
NodeCond cond = NodeCond.getLeafCond(membershipCond);
userListContainer.replace(new UserSearchResultPanel("userList", true, cond, pageRef, userRestClient));
target.add(userListContainer);
}
});