/// Recommended way to create systems in general: pool.CreateSystem<RenderPositionSystem>();
public ReactiveSystem(IGroupObserverSystem subSystem)
: this(subSystem, subSystem.groupObserver)
{
}
/// Recommended way to create systems in general: pool.CreateSystem(new MySystem());
public ReactiveSystem(IGroupObserverSystem subSystem) :
this(subSystem, subSystem.groupObserver)
{
}
