code: public void setRequestTime(long requestTime) {
  
          checkFrozen();
          if (requestTime == CURRENT_TIME) {
              m_requestTime = System.currentTimeMillis();
          } else {
              m_requestTime = requestTime;
          }
      }
docs: Sets the request time used for validation of resource publication and expiration dates.<p>
  
  @param requestTime the request time to set
  
  @see CmsRequestContext#getRequestTime()