Manual mentions "example file" with python function get_password; no such file

[Iain Dalton]

At the end of the manual, there's:

The file specified with:

    pythonfile=~/bin/offlineimap-helpers.py

contains python functions that I used for two purposes: Fetching
passwords from the gnome-keyring and translating folder names on the
server to local foldernames. The python file should contain all the
functions that are called here. get_username and get_password are part
of the interaction with gnome-keyring and not printed here. Find them
in the example file that is in the tarball or here.

But there's no offline-helpers.py or any file containing "get_password".