How to use the playsound.utils.chat_formatting.warning function in playsound

await self.bot.type()

        server = ctx.message.server

        if server.id not in os.listdir(self.sound_base):
            os.makedirs(os.path.join(self.sound_base, server.id))

        if server.id not in self.settings:
            self.settings[server.id] = {}
            dataIO.save_json(self.settings_path, self.settings)

        strbuffer = self.list_sounds(server.id)

        if len(strbuffer) == 0:
            await self.bot.reply(cf.warning(
                "No sounds found. Use `{}addsound` to add one.".format(
                    ctx.prefix)))
            return

        mess = "```"
        for line in strbuffer:
            if len(mess) + len(line) + 4 < 2000:
                mess += "\n" + line
            else:
                mess += "```"
                await self.bot.whisper(mess)
                mess = "```" + line
        if mess != "":
            mess += "```"
            await self.bot.whisper(mess)