interface dom.UnderlyingByteSourceimport { type dom } from "https://deno.land/x/evt@v2.4.17/lib/index.ts"; const { UnderlyingByteSource } = dom; PropertiesoptionalautoAllocateChunkSize: numberoptionalcancel: ReadableStreamErrorCallbackoptionalpull: ReadableByteStreamControllerCallbackoptionalstart: ReadableByteStreamControllerCallbacktype: "bytes"