docs: def ReadClientCrashInfoHistory(self, client_id, cursor=None):
      """Reads the full crash history for a particular client."""
      cursor.execute(
          "SELECT UNIX_TIMESTAMP(timestamp), crash_info "
          "FROM client_crash_history WHERE "
          "client_crash_history.client_id = %s "
          "ORDER BY timestamp DESC", [db_utils.ClientIDToInt(client_id)])
      ret = []
      for timestamp, crash_info in cursor.fetchall():
        ci = rdf_client.ClientCrash.FromSerializedString(crash_info)
        ci.timestamp = mysql_utils.TimestampToRDFDatetime(timestamp)
        ret.append(ci)
      return ret