function isRangeHeaderimport { isRangeHeader } from "https://deno.land/x/http_utils@2.0.0-beta.1/header.ts"; isRangeHeader(input: string): input is `${RangeHeader}`Whether the input is RangeHeader or not. ExamplesExample 1 import { isRangeHeader } from "https://deno.land/x/http_utils@$VERSION/header.ts"; import { assert } from "https://deno.land/std/testing/asserts.ts"; assert(isRangeHeader("range")); assert(!isRangeHeader("<others>")); Parametersinput: stringReturnsinput is `${RangeHeader}`