import { etag } from "https://deno.land/x/oak@v11.0.0/mod.ts";
const { ifNoneMatch } = etag;
A helper function that takes the value from the If-No-Match header and
an entity and returns false if the ETag for the entity matches the
supplied value, otherwise false.
See MDN's If-None-Match
article for more information on how to use this function.