If you navigate to: https://airtable.com/developers/extensions/api/models/Table, you can see a link for the Field model listed in the description for the fields member. However, if you click that link it bounces you back to an index page for the documentation not the documentation page for Field.
The reason for this is because the link for Field is wrong.
Documentation contains:
https://airtable.com/developers/extensions/developers/extensions/api/models/Field
When it should be:
https://airtable.com/developers/extensions/api/models/Field