static PlayerLoopSystem[] InsertSystem <T>(World world, PlayerLoopSystem[] oldArray, int insertIndex)
where T : ComponentSystemBase
{
T system = world.GetExistingSystem <T>();
if (system == null)
{
return(oldArray);
}
var newArray = new PlayerLoopSystem[oldArray.Length + 1];
int o = 0;
for (int n = 0; n < newArray.Length; ++n)
{
if (n == insertIndex)
{
continue;
}
newArray[n] = oldArray[o];
++o;
}
ScriptBehaviourUpdateOrder.InsertManagerIntoSubsystemList <T>(newArray, insertIndex, world.GetOrCreateSystem <T>());
return(newArray);
}