Creates database logs for all the image file names in the global
        variable :data:`thumb_uuid`.

def _log_images(self):
        """Creates database logs for all the image file names in the global
        variable :data:`thumb_uuid`.
        """
        from time import time
        from acorn.logging.database import record        
        entry = {
            "m": "plot",
            "a": None,
            "s": time(),
            "r": thumb_uuid,
        }
        
        #See if we can match the executed cell's code up with one that we
        #intercepted in the past..
        code = self.shell.user_ns.get("i_{0:d}".format(self.cellid))
        cellid = self._find_cellid(code)
        if cellid is None:
            cellid = self.cellid
        #Store the contents of the cell so they are up to date for next time.
        self.cellids[cellid] = code

        from acorn import msg
        record("__main__.{}".format(cellid), entry)
        msg.info(entry, 1)