Another syntax question about two dots

Question

i'd learned that the meaning of " .. " is to access the child nodes in XML.
but i saw this in source of flex, <mx.skins.halo.RadioButtonIcon.as>
   override protected function updateDisplayList(w:Number, h:Number):void
             g..beginFill(radioColor);
   where variable g is a graphics object. ordinary, this should be "g.beginFill", i thought.
   now my question is, what does the ".." mean ?
   thank you for any helps.

Answer 1

I'll ask people I know on the Apache team. I know they code review everything, but it seems to me if they're going to use nonstandard notation they should comment so people know what it means. I don't see any possible way this could be referring to xml, since there is no beginFill method on XML, and hacking the XML object on that scale through prototype would be highly destructive to the codebase.
Note that just because source is being picked up and shown as the source code doesn't 100% mean that this code was what the swc is compiled from.
Note that if you try
import flash.display.Graphics;
var g:Graphics = graphics;
g.beginFill(0xFF0000);
g.drawCircle(100, 100, 100);
and
import flash.display.Graphics;
var g:Graphics = graphics;
g..beginFill(0xFF0000);
g..drawCircle(100, 100, 100);
They both yield the same visual result. My suspicion is maybe this is a shortcut to the GPU.