old_contents: /**
   * Copyright (c) Microsoft Corporation. All rights reserved.
   * Licensed under the MIT License.
   */
  
  module.exports = function(controller) {
  
      controller.hears('sample','message', async(bot, message) => {
          await bot.reply(message, 'I heard a sample message.');
      });
  
      controller.on('message', async(bot, message) => {
          await bot.reply(message, `Echo: ${ message.text }`);
      });
  
  }
new_contents: /**
   * Copyright (c) Microsoft Corporation. All rights reserved.
   * Licensed under the MIT License.
   */
  
  module.exports = function(controller) {
  
      controller.hears('sample','message,direct_message', async(bot, message) => {
          await bot.reply(message, 'I heard a sample message.');
      });
  
      controller.on('message,direct_message', async(bot, message) => {
          await bot.reply(message, `Echo: ${ message.text }`);
      });
  
  }
  
subject: Update sample_echo to respond to direct messages