docs: def intToID(idnum, prefix):
      """
      Returns the ID name for the given ID number, spreadsheet-style, i.e. from a to z,
      then from aa to az, ba to bz, etc., until zz.
      """
      rid = ''
  
      while idnum > 0:
          idnum -= 1
          rid = chr((idnum % 26) + ord('a')) + rid
          idnum = int(idnum / 26)
  
      return prefix + rid