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: dialog.rb
    path of file: ./repos/shoes4/shoes-core/lib/shoes
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

class Shoes
  class Dialog
    def initialize
      @gui = Shoes.backend::Dialog.new
    end

    def alert(msg = '')
      @gui.alert msg
    end

    def confirm(msg = '')
      @gui.confirm ms
    
    def ask(msg, args)
      ask_me = Shoes.app(title: args[:title] || "Shoes asks:",
                         width: 300, height: 125,
                         modal: true) do
        stack do
          para msg, margin: 10

          @e = edit_line margin_left: 10,
                         width:       width - 20,
                         secret:      args[:secret]

          flow margin_top: 10 do
            button "OK", margin_left: 150 do
              @result = @e.text
              close
            end

            button "Cancel" do
              @result = nil
              close
            end
          end
        end

        def result
          @result ||= nil
        end
      end

      ask_me.wait_until_closed
      ask_me.result
    end