docs: public boolean pathExists(String path)
      {
          String[] pathElements = path.split("/");
          ZConfig current = this;
          for (String pathElem : pathElements) {
              if (pathElem.isEmpty()) {
                  continue;
              }
              current = current.children.get(pathElem);
              if (current == null) {
                  return false;
              }
          }
          return true;
      }