docs: def dateAndDepthFromOoid(ooid):
    """ Extract the encoded date and expected storage depth from an ooid.
    ooid: The ooid from which to extract the info
    returns (datetime(yyyy,mm,dd),depth) if the ooid is in expected format else (None,None)
    """
    year = month = day = None
    try:
      day = int(ooid[-2:])
    except:
      return None,None
    try:
      month = int(ooid[-4:-2])
    except:
      return None,None
    try:
      year = 2000 + int(ooid[-6:-4])
      depth = int(ooid[-7])
      if not depth: depth = oldHardDepth
      return (dt.datetime(year,month,day,tzinfo=UTC),depth)
    except:
      return None,None
    return None,None