NameError: name 'ManualJournalLine' is not defined

[unstablejello]

I'm trying to write a program to create/edit manual journals with this sample app, but the function ManualJournalLine() from the SDK doc does not seem to exist. I'm new to python and not sure how to define this function. I think it's supposed to have the variables line_amount, account_code and description.

There is a comment that says updateOrCreateManualJournals is TODO. Is this not possible yet?

Any insight is appreciated!