docs: public ChangeGraphResponse changeGraph(Collection<JsonFeature> collection) {
          // TODO allow calling this method if called before CH preparation
          if (getCHFactoryDecorator().isEnabled())
              throw new IllegalArgumentException("To use the changeGraph API you need to turn off CH");
  
          Lock writeLock = readWriteLock.writeLock();
          writeLock.lock();
          try {
              ChangeGraphHelper overlay = createChangeGraphHelper(ghStorage, locationIndex);
              long updateCount = overlay.applyChanges(encodingManager, collection);
              return new ChangeGraphResponse(updateCount);
          } finally {
              writeLock.unlock();
          }
      }