code: private void tryUnlock() {
  
          if (m_resource != null) {
              try {
                  A_CmsUI.getCmsObject().unlockResource(m_resource);
              } catch (CmsException e) {
                  LOG.debug("Unlocking resource " + m_resource.getRootPath() + " failed", e);
              }
          }
      }
docs: Tries to unlock the current resource.<p>