Trifolium.Config.api_domain

You're seeing just the function api_domain, go back to Trifolium.Config module for more information.

Returns the domain of the Trefle API. This will default to "trefle.io/", but can be overridden (in case you have a custom Trefle installation) using the following setting in mix.exs:

config :trifolium, api_domain: "trefle.yourdomain.com/"