I’d like to write a plugin that will add an option to the dropdown field so that I can add a URL to a web API. Something like in the image below.
Then when a form is viewed, I would have the plugin look for the “URL to Web API” field value, fetch the data from the API and populate the dropdown. Like outlined here: Dynamically Populating Drop Down, Radio Buttons or Multi-Select Fields - Gravity Forms
Is there documentation on how to add the “URL to Web API” field so it is displayed in the Field Settings?