code: def HuntIDToInt(hunt_id):
    
    # TODO(user): This code is only needed for a brief period of time when we
    # allow running new rel-db flows with old aff4-based hunts. In this scenario
    # parent_hunt_id is effectively not used, but it has to be an
    # integer. Stripping "H:" from hunt ids then makes the rel-db happy. Remove
    # this code when hunts are rel-db only.
    if hunt_id.startswith("H:"):
      hunt_id = hunt_id[2:]
  
    try:
      return int(hunt_id or "0", 16)
    except ValueError as e:
      raise HuntIDIsNotAnIntegerError(e)
docs: Convert hunt id string to an integer.