def mask(self):
        if not self.maskVar:
            mask = self.pixmap().createMaskFromColor(self.transparentColor)
            self.maskVar = QtGui.QRegion(mask)
        return self.maskVar
mask() -> QRegion
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/packages/spreadsheet/spreadsheet_helpers.py/CellResizerConfig.mask