def METHOD_NAME(since=0):
    """
    Retrieve the alerts since the given timestamp (in milliseconds)
    """
    if len(_alerts) == 0:
        return []
    for i in range(len(_alerts)-1, -1, -1):
        if _alerts[i]['time'] < since:
            i += 1
            break
    if i >= len(_alerts):
        return []
    return _alerts[i:]