code: public float originY () {
      if (isSet(Flag.ODIRTY)) {
        float height = height();
        if (height > 0) {
          this.originX = origin.ox(width());
          this.originY = origin.oy(height);
          setFlag(Flag.ODIRTY, false);
        }
      }
      return originY;
    }
docs: Returns the y-component of the layer's origin.