async def METHOD_NAME(self, stat_list):
    """ Bulk update statistics table keys and their values
    Args:
        stat_list: dict containing statistics keys and increment values
    Returns:
        None
    """
    if not isinstance(stat_list, dict):
        raise TypeError('stat_list must be a dict')
    try:
        payload = {"updates": []}
        for k, v in stat_list.items():
            payload_item = PayloadBuilder() \
                .WHERE(["key", "=", k]) \
                .EXPR(["value", "+", v]) \
                .payload()
            payload['updates'].append(json.loads(payload_item))
        await self._storage.update_tbl("statistics", json.dumps(payload, sort_keys=False))
    except Exception as ex:
        _logger.exception(ex, 'Unable to bulk update statistics')
        raise