Full url for other resources

Hi,
Is there a way to get the complete url for other resources in the api.
Ex: If there are two resources at (/resource1) and (/resource2) and resource2 needs to provide complete url for resource1. We use url_for in flask with _external=True. Is there a similar way to get the complete url?

Start with the API resources described as /resource1 and /resource2, and compare the requested behavior with Flask's url_for using _external=True. Determine whether Chalice already exposes a way to generate complete URLs across resources; done would mean a clear supported mechanism or a documented explanation of its absence.

Written by the indexing model from the issue text.