code: function (program, app, callback) {
      var attachPlugin = function (pluginName, cb) {
        pluginHelpers.start(pluginName, program, app, cb);
      };
  
      var plugins = Object.keys(pluginHelpers.loadedPlugins)
      async.eachSeries(plugins, attachPlugin, function() {
        callback();
      });
    }
docs: Start all plugins.
  
  @param program Program or Plain object.
  @param app Express app.
  @param callback Termination.