code: protected CmsObject getCms() {
  
          if (m_cms == null) {
              try {
                  m_cms = OpenCms.initCmsObject(A_CmsUI.getCmsObject());
                  m_cms.getRequestContext().setSiteRoot("");
              } catch (CmsException e) {
                  return null;
              }
          }
          return m_cms;
      }
docs: Gets a copy of the cms object set to root site.<p>
  
  @return CmsObject