Liberator.Resource.if_unmodified_since_exists-question-mark

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

if_unmodified_since_exists?(arg1)

View Source (since 1.0)

Specs

if_unmodified_since_exists?(Plug.Conn.t()) :: true | false

Check if the If-Unmodified-Since header exists.

Used internally; it is not advised to override this function.