This event can be used for monitoring commands that are
sent to server before they are actually transmitted. At
this point, you can change this data and it will be sent as
you define it - without wodXMPP knowing anything about
it. Remote side will receive your changes.
Beware - what you're doing here is dangerous for
wodXMPP. You may break its internal mechanism of behavior,
and strange results may occur. But - to provide you with
more freedom over what's going on 'under the
hood', we have provided this event for advanced
users.