code: public void onReceiveVfsPreloadData(CmsVfsEntryBean vfsPreloadData) {
  
          String siteRoot = vfsPreloadData.getSiteRoot();
          fillInitially(Collections.singletonList(vfsPreloadData), siteRoot);
      }
docs: This method is called when the VFS tree preload data is received.<p>
  
  @param vfsPreloadData the VFS tree preload data