* @return The new topmost PolicyEngineData or null if the stack is empty.
*/
public PolicyEngineData commitPolicyEngineData() {
if (pedStackPointer > 1) {
pedStackPointer--;
PolicyEngineData ped = (PolicyEngineData) pedStack.get(pedStackPointer);
pedStackPointer--;
pedStack.add(pedStackPointer, ped);
pedStackPointer++;
return ped;
} else {