Event:LOADING START

__NOTOC__
The LOADING_START event message is triggered as soon as a cut-screen (intermediate loading screen) is being loaded in the game.
== Parameters ==
=== Returns ===
:;arg1
::void - TODO.
:;arg2
::void - TODO.
==Example==
The worldframe is registered to listen for LOADING_START and will hide itself on the event.
-- worldframe.xml
...
<Scripts>
 <OnUpdate>
 WorldFrame_OnUpdate(arg1);
 </OnUpdate>
 <OnShow>
 LoginParent:Hide();
 </OnShow>
 <OnLoad>
 this:RegisterEvent("LOADING_START");
 this:RegisterEvent("LOADING_END");
 </OnLoad>
 <OnEvent>
 if ( event == "LOADING_START" ) then
 WorldFrame:Hide();
 return;
 end
 if ( event == "LOADING_END" ) then
 WorldFrame:Show();
 return;
 end
 </OnEvent>
</Scripts>
==Notes==
Investigation on events:
* Does RoM implement an event dispatcher = a delegate object, which listens for any events being raised and correspondingly calls any event handling functions or processes that were registered for the event with the delegate object?
* Which object(s) can raise this event, i.e. is the event sender ? I assume the frame object that represents a cut-screen (intermediate loading screen) to be, but which frame object is known as such?
==Related events==
* LOADING_END