code: function(locals, cb) {
      if (typeof locals === 'function') {
        cb = locals;
        locals = {};
      }
      this.app.render(this, locals, cb);
      return this;
    }
docs: Asynchronously render a view.
  
  ```js
  pages.get('home.md')
  .render({title: 'Home'}, function(err, res) {
  //=> do stuff with `res`
  });
  ```
  
  @param  {Object} `locals` Optionally pass locals to the engine.
  @return {Object} `View` instance, for chaining.
  @api public