internal void AdjustMaskContainer()
{
float mx, my;
if (_displayOnLeft && _vtScrollBar != null)
mx = Mathf.FloorToInt(_owner.margin.left + _vtScrollBar.width);
else
mx = Mathf.FloorToInt(_owner.margin.left);
my = Mathf.FloorToInt(_owner.margin.top);
mx += _owner._alignOffset.x;
my += _owner._alignOffset.y;
_maskContainer.SetXY(mx, my);
}