whichSubtrahendSet method
Implementation
SetDifferenceRequest___Subtrahend_SubtrahendSet whichSubtrahendSet() =>
_SetDifferenceRequest___Subtrahend_SubtrahendSetByTag[$_whichOneof(0)]!;
SetDifferenceRequest___Subtrahend_SubtrahendSet whichSubtrahendSet() =>
_SetDifferenceRequest___Subtrahend_SubtrahendSetByTag[$_whichOneof(0)]!;