code: function getLaunchStoryboardImagesDir (projectRoot, platformProjDir) {
      var launchStoryboardImagesDir;
      var xcassetsExists = folderExists(path.join(projectRoot, platformProjDir, 'Images.xcassets/'));
  
      if (xcassetsExists) {
          launchStoryboardImagesDir = path.join(platformProjDir, 'Images.xcassets/LaunchStoryboard.imageset/');
      } else {
          // if we don't have a asset library for images, we can't do the storyboard.
          launchStoryboardImagesDir = null;
      }
  
      return launchStoryboardImagesDir;
  }
docs: Returns the directory for the Launch Storyboard image set, if image sets are being used. If they aren't
  being used, returns null.
  
  @param  {string} projectRoot        The project's root directory
  @param  {string} platformProjDir    The platform's project directory