function reg_recordingimport { reg_recording } from "https://deno.land/x/denops_std@v4.1.5/function/mod.ts"; reg_recording(denops: Denops): Promise<unknown>Returns the single letter name of the register being recorded. Returns an empty string when not recording. See q. Returns the single letter name of the register being recorded. Returns an empty string when not recording. See q. Parametersdenops: DenopsReturnsPromise<unknown>