function defineGlobalThisimport { defineGlobalThis } from "https://deno.land/x/unitest@v1.0.0-beta.82/mock/mod.ts"; defineGlobalThis<T extends keyof globalThis>(key: T, fn: globalThis[T]): () => voiddefine custom globalThis property and return reset it Type ParametersT extends keyof globalThisParameterskey: Tfn: globalThis[T]Returns() => void