old_value = self._value
Conditional set: set_if atomically sets the value only when the current value satisfies a predicate, useful for state machine transitions that should only happen from a specific state.
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“真没想到，赣南老区也有未来产业。”从广东省东莞市开车去南昌的杨美丹难掩振奋，“我要发朋友圈分享一下，我们的无人机已经飞进了老区的山沟沟。”
maintain enough concentration to review more than about 400 lines of code at a
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Москалькова рассказала о реакции родственников на освобождение пленных бойцов СВО20:47，更多细节参见体育直播