Liberator.Resource.allowed_methods

You're seeing just the callback allowed_methods, go back to Liberator.Resource module for more information.
Link to this callback

allowed_methods(arg1)

View Source (since 1.0)

Specs

allowed_methods(Plug.Conn.t()) :: list()

Returns a list of HTTP methods that this module serves.

The methods returned by this function should be upper-case strings, like "GET", "POST", etc.