Missing `get_nth_statement` python method

[gikf]

Describe the bug
Python helper method get_nth_statement is mentioned in the documentation - https://opensource.freecodecamp.org/curriculum-helpers/python.html#get-the-nth-statement, but I'm unable to find it in the https://github.com/freeCodeCamp/curriculum-helpers/blob/main/python/py_helpers.py

[a2937]

I don't quite understand how nth statement is intended to work and the example is confusing me.