function etag.getEntityimport { etag } from "https://deno.land/x/oak@v13.1.0/mod.ts"; const { getEntity } = etag; getEntity<S extends State = Record<string, any>>(context: Context<S>): Promise< | string | Uint8Array | Deno.FileInfo | undefined>For a given Context, try to determine the response body entity that an ETag can be calculated from. Type ParametersoptionalS extends State = Record<string, any>Parameterscontext: Context<S>ReturnsPromise< | string | Uint8Array | Deno.FileInfo | undefined>