public static void PerformPlayDtmfCallAction(this ICXProviderDelegate This, CXProvider provider, CXPlayDtmfCallAction action) => throw new PlatformNotSupportedException(Constants.UnavailableOnMacOS);
public virtual void PerformPlayDtmfCallAction(CXProvider provider, CXPlayDtmfCallAction action) => throw new PlatformNotSupportedException(Constants.UnavailableOnMacOS);
