@Override
    public int getMaxStages(@Nonnull final SessionData data) {
        return 1;
    }
Command that allows to retrieve the list of idle users. Idle users are those that are online, but not active.
Active users are those users that have sent an available presence.

@author Guus der Kinderen, guus@goodbytes.nl
@see <a href="https://xmpp.org/extensions/xep-0133.html#get-idle-users-list">XEP-0133 Service Administration: Get List of Idle Users</a>
xmppserver/src/main/java/org/jivesoftware/openfire/commands/admin/GetListIdleUsers.java