docs: @Override
      public WsResource resolveRelative(String relativeResourceURI) {
          if (relativeResourceURI == null)
              return null;
  
          // If it's an empty string, return this
          if (relativeResourceURI.length() == 0)
              return this;
  
          // If it's ${/}, return the virtual root
          if (relativeResourceURI.equals(WsLocationConstants.SYMBOL_ROOT_NODE))
              return parent;
  
          return ResourceUtils.getRelativeResource(this, relativeResourceURI);
      }