code: function getLabel(app, options) {
    if (typeof options.getLabel === 'function') {
      return options.getLabel(app, options);
    }
    return app.full_name || app.nickname || app.name;
  }
docs: Figure out a label to add for a node in the tree.
  
  @param  {Object} `app` Current node/app being iterated over
  @param  {Object} `options` Pass `getLabel` on options to handle yourself.
  @return {String} label to be shown
  @api public
  @name  options.getLabel