public void updateNetworkData() {
    HashMap<String, HashMap<Integer, SimulationElement>> originalNetwork = new HashMap<>();
    HashMap<String, HashMap<Integer, SimulationElement>> originalTransit = new HashMap<>();
    HashMap<String, HashMap<Integer, SimulationElement>> networkCopy = new HashMap<>();
    HashMap<String, HashMap<Integer, SimulationElement>> transitCopy = new HashMap<>();
    HashMap<String, HashMap<Integer, SimulationElement>> totalCopy = new HashMap<>();

    historyIndex++;
    removeRedo();

    originalNetwork.putAll(currentNetwork.getNetworkElements());
    originalTransit.putAll(currentTransit.getTransits());

    for (Entry<String, HashMap<Integer, SimulationElement>> entry : originalNetwork.entrySet()) {
      networkCopy.put(entry.getKey(), new HashMap<>(entry.getValue()));
    }
    networkHistory.add(historyIndex, networkCopy);
    for (Entry<String, HashMap<Integer, SimulationElement>> entry : originalTransit.entrySet()) {
      transitCopy.put(entry.getKey(), new HashMap<>(entry.getValue()));
    }
    transitHistory.add(historyIndex, transitCopy);

    totalCopy.putAll(networkCopy);
    totalCopy.putAll(transitCopy);
    dataReceiver.updateSimulationElements(totalCopy);
    simulationBox.updateRendering();
  }
 /**
  * Use for undo and redo update.
  *
  * @param history The index of the required version of the network to reload
  */
 public void updateHistoryData(int history) {
   HashMap<String, HashMap<Integer, SimulationElement>> original = new HashMap<>();
   original.putAll(networkHistory.get(history));
   original.putAll(transitHistory.get(history));
   currentNetwork.setNetworkElements(networkHistory.get(history));
   currentTransit.setTransits(transitHistory.get(history));
   dataReceiver.updateSimulationElements(original);
   simulationBox.updateRendering();
 }