protected override TValue ExecuteInContext(AudioMetadata.ValueHelper <TValue> context)
{
var oldValue = context.GetCurrentValue(Argument.BeatIndex);
context.TrySetValue(Argument.BeatIndex, Argument.Value);
return(oldValue);
}
protected override void UndoInContext(AudioMetadata.ValueHelper <TValue> context, TValue savedInfo)
{
context.TrySetValue(Argument.BeatIndex, savedInfo);
}