interface UnderlyingSourceimport { type UnderlyingSource } from "https://deno.land/x/windmill@v1.361.1/node_modules/evt/src/lib/types/lib.dom.ts"; Type ParametersoptionalR = anyPropertiesoptionalcancel: ReadableStreamErrorCallbackoptionalpull: ReadableStreamDefaultControllerCallback<R>optionalstart: ReadableStreamDefaultControllerCallback<R>optionaltype: undefined