num pivotY

The y-coordinate of the pivot point of this display object.

The pivot point is the point this display object rotates around. It is also the anchor point for the x/y-coordinates and the center for all transformations like scaling.

The default pivot point is (0,0).

Source 

@override
num get pivotY => _pivotY;
void pivotY=(num value)

Source 

@override
set pivotY(num value) {
  if (value is num) _pivotY = value;
  _transformationMatrixRefresh = true;
}