Saver api docs missing argument in function signature?

[daviewales]

I'm looking at the api docs for savers, and the suggested function signature is:

@VisiData.api
def save_table(path, *sheets):

But this doesn't seem to work.
Sneaking a peak at the CSV saver, it appears I should expect the vd object to be passed in as well:

@VisiData.api
def save_table(vd, path, *sheets):

Is this an omission from the docs, or is it something I should have naturally expected to be the case?