code: protected void checkFrozen() throws CmsRuntimeException {
  
          if (m_frozen) {
              throw new CmsRuntimeException(Messages.get().container(Messages.ERR_JOB_INFO_FROZEN_1, getJobName()));
          }
      }
docs: Checks if this job info configuration is frozen.<p>
  
  @throws CmsRuntimeException in case the configuration is already frozen