# File lib/termtter/client.rb, line 344
      def confirm(message, default_yes = true, &block)
        pause # TODO: TaskManager から呼ばれるならこれいらないなぁ

        prompt =
          if default_yes
            "\"#{message}".strip + "\" [Y/n] "
          else
            "\"#{message}".strip + "\" [N/y] "
          end
        readline = Readline.readline(prompt, false)
        result =
          if !!(/^$/ =~ readline) 
            default_yes
          else
            !!(/^y/i =~ readline)
          end

        if result && block
          block.call
        end

        result
      ensure
        resume # TODO: TaskManager から呼ばれるならこれいらないなぁ
      end