Where is mDisplayTargetResolution used?

I am chasing down a bug where if you nest a TSGameCtrl inside another control the lighting/shadow/glow for the scene ends up being offset by the same amount as the TSGameCtrl.

I notices this line in GuiTSCtrl::onRender

// We're going to be displaying this render at size of this control in
   // pixels - let the scene know so that it can calculate e.g. reflections
   // correctly for that final display result.
   gClientSceneGraph->setDisplayTargetResolution(getExtent());

Which goes to Scene manager

void SceneManager::setDisplayTargetResolution( const Point2I &size )
{
   mDisplayTargetResolution = size;
}

Note this is value is only receiving a 2d Point not the start position. Thing is, mDisplayTargetResolution is not used, at least when I search for mDisplayTargetResolution or find all references I get nothing. So could someone point me to where is was suppose to be used?


FYI the Getter is never called

getDisplayTargetResolution();