docs: public boolean showSiteSelector() {
  
          if (getSettings().getUserSettings().getRestrictExplorerView()) {
              // restricted explorer view to site and folder, do not show site selector
              return false;
          }
          // count available sites
          int siteCount = OpenCms.getSiteManager().getAvailableSites(getCms(), true).size();
          return (siteCount > 1);
      }