code: public void setDateExpires(long dateExpires) {
  
          m_dateExpires = dateExpires;
          if (LOG.isDebugEnabled()) {
              long now = System.currentTimeMillis();
              LOG.debug(
                  Messages.get().getBundle().key(
                      Messages.LOG_FLEXCACHEENTRY_SET_EXPIRATION_DATE_3,
                      new Long(m_dateExpires),
                      new Long(now),
                      new Long(m_dateExpires - now)));
          }
      }
docs: Sets the expiration date of this Flex cache entry exactly to the
  given time.<p>
  
  @param dateExpires the time to expire this cache entry