function test_null_channelimport { test_null_channel } from "https://deno.land/x/denops_std@v5.2.0/function/vim/mod.ts"; test_null_channel(denops: Denops): Promise<unknown>Return a Channel that is null. Only useful for testing. only available when compiled with the +channel feature Return a Channel that is null. Only useful for testing. only available when compiled with the +channel feature Parametersdenops: DenopsReturnsPromise<unknown>