Passing page options to the API

[rosgoo]

Hello,
The Anvil docs mention you can pass page parameters to the APi in the following section:
https://www.useanvil.com/docs/api/generate-pdf/#generating-a-pdf

However, it seems like the GeneratePDFPayload model on this client does not let you pass in those options.
What's the expected way to do this currently using this client?
Thank you!