void RegisterMovementCallback(IMovementObserver movementTracker)
{
foreach (var i in trackers)
{
if (i == movementTracker)
{
return;
}
}
trackers.Add(movementTracker);
}
void Unregister(IMovementObserver movementTracker)
{
foreach (var i in trackers)
{
if (i == movementTracker)
{
trackers.Remove(i);
return;
}
}
}