code: @Override
      public void keypoint() throws LogClosedException, InternalLogException, LogIncompatibleException {
          if (tc.isEntryEnabled())
              Tr.entry(tc, "keypoint", this);
  
          internalKeypoint();
  
          if (tc.isEntryEnabled())
              Tr.exit(tc, "keypoint");
      }
docs: <p>
  Instructs the recovery log to perfom a keypoint operation. Any redundant
  information will be removed and all cached information will be forced to disk.
  </p>
  
  @exception LogClosedException Thrown if the log is closed.
  @exception InternalLogException Thrown if an unexpected error has occured.
  @exception LogIncompatibleException An attempt has been made access a recovery
  log that is not compatible with this version
  of the service.