Why operatorController.exceedStoreLimitLocked return fasle when limiter is nil

// exceedStoreLimitLocked returns true if the store exceeds the cost limit after adding the operator. Otherwise, returns false.
func (oc *OperatorController) exceedStoreLimitLocked(ops ...*operator.Operator) bool {
	opInfluence := NewTotalOpInfluence(ops, oc.cluster)
	for storeID := range opInfluence.StoresInfluence {
		for _, v := range storelimit.TypeNameValue {
			stepCost := opInfluence.GetStoreInfluence(storeID).GetStepCost(v)
			if stepCost == 0 {
				continue
			}
			limiter := oc.getOrCreateStoreLimit(storeID, v)
			if limiter == nil {
				return false
			}
			if limiter.Available() < stepCost {
				return true
			}
		}
	}
	return false
}

l have some question about this code,why return false when limiter is nil,maybe use continue will be better

It seems that the only case a limiter will be nil is the corresponding store has been removed. I believe this is to prevent PD from panicking. Since the store has been removed anyway, and even if it passes this check, the operator will not be executed eventually.