code: public void load() {
          try {
              setPersistFile();
              XMLObjectReader reader = XMLObjectReader.newInstance(new FileInputStream(persistFile.toString()));
              reader.setBinding(binding);
              load(reader);
          } catch (XMLStreamException | FileNotFoundException e) {
              System.err.println(String.format("Error while load the MAP Resource state from file=%s", persistFile.toString()));
              e.printStackTrace();
          }
      }
docs: Load and create LinkSets and Link from persisted file
  <p>
  load() is called from MAPStackImpl