You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: commands.rb
    path of file: ./repos/acli/mrblib/acli
    
    the code of the file until where you have to start completion: module Acli
  class Commands
    COMMANDS = {
      "s" => "subscribe",
      "s+" => "isubscribe",
      "p" => "perform"
    
    def request_message
      msg = {}
      loop do
        key = Utils.prompt("Enter key (or press ENTER to finish): ")
        break msg if key.empty?
        msg[key] = Utils.serialize(Utils.prompt("Enter value: "))
      end
    end