method Aleph.prototype.fetchModuleimport { Aleph } from "https://deno.land/x/aleph@v0.3.0-beta.12/server/aleph.ts"; fetchModule(specifier: string): Promise<{ content: Uint8Array; contentType: string | null; }>fetch module source by the specifier. Parametersspecifier: stringReturnsPromise<{ content: Uint8Array; contentType: string | null; }>