def preparePixmap(self):
        painter = QPainter(self.outPixmap())
        painter.drawPixmap(QPoint(0, 0), self.startPixmap())
        return 0.0, 1.0
Ensure that backends produce the same result for None dict keys
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/qt/q_pixmap_transition.py/QCrossFadeTransition.preparePixmap--crossover with--dataset/ETHPy150Open jsonpickle/jsonpickle/tests/backend_test.py/BackendBase.test_None_dict_key