public override void Undo()
{
DataOwner.SetData(Command.Params, OldValue);
}
public ObserverExecutor(IDataOwner <TParams, TValue> dataOwner, ObserverCommand <TParams, TValue> command)
: base(command)
{
DataOwner = dataOwner ?? throw new ArgumentNullException(nameof(dataOwner));
OldValue = DataOwner.GetData(Command.Params);
}
public override void Execute()
{
DataOwner.SetData(Command.Params, Command.Value);
}
