code: CmsObject getRootCms() {
  
          try {
              if (m_rootCms == null) {
  
                  m_rootCms = OpenCms.initCmsObject(A_CmsUI.getCmsObject());
                  m_rootCms.getRequestContext().setSiteRoot("");
              }
          } catch (CmsException e) {
              //
          }
          return m_rootCms;
  
      }
docs: Returns a cms object at root-site.<p>
  
  @return cmsobject