Liberator.Resource.handle_not_modified

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

handle_not_modified(arg1)

View Source (since 1.0)

Specs

handle_not_modified(Plug.Conn.t()) :: Plug.Conn.t()

Returns content for a 304 Not Modified response.