docs: private List<String> loadKeyList() {
          Set<String> keySet = new HashSet<String>();
          for (EDBObjectEntry entry : startState.values()) {
              keySet.add(entry.getKey());
          }
          for (EDBObjectEntry entry : endState.values()) {
              keySet.add(entry.getKey());
          }
          return new ArrayList<String>(keySet);
      }