function writeTrailersimport { writeTrailers } from "https://deno.land/std@v0.56.0/http/_io.ts"; writeTrailers(w: Deno.Writer,headers: Headers,trailers: Headers,): Promise<void>write trailer headers to writer. it mostly should be called after writeResponse Parametersw: Deno.Writerheaders: Headerstrailers: HeadersReturnsPromise<void>