/**
  * @return void
  * @param $planList Array of planCollections
  * @desc compares Actions
  */
 function compareActions($planList, $updateHistory)
 {
     //Find a list of Action Packets
     $currentActions = planComparison::findNextActions($planList, $updateHistory);
     // [ACTION, Plan-i] , [ACTION, Plan-i+1]
     // [ACTION-Plan-i,Plan-i+1]
     //Merge relevant Action Packets
     $mergedActionPackets = planComparison::composeActions($currentActions);
     return $mergedActionPackets;
 }