LayoutManager `beforeRender()` and `render()` callback scaffoldings.

LayoutManager beforeRender() and render() callbacks

/**
 * The beforeRender callback scaffolding.
 *
 * @param  {Backbone.Layout} view The instance of the LayoutManager.
 * @return {void} Don't care.
 */
beforeRender: function( view ) {
  console.log(view.template); // show the template of the view instance
 
  // optionally beforeRender can be async
  var done = this.async();
 
  asyncMethod( function() {
 
    // do not perform render, render() callback is never called
    view.preventDOM();
 
    // pass controll back to LM
    done();
  });
},
 
/**
 * The render callback scaffolding.
 *
 * @param  {Function} template The template func.
 * @param  {Object} context The context of the template.
 * @param  {Backbone.Layout} view The instance of the LayoutManager.
 * @return {string} The rendered templated.
 */
render: function( template, context, view ) {
  console.log(view.template); // show the template of the view instance
 
  // optionally beforeRender can be async
  var done = this.async();
 
  asyncMethod( function() {
 
    // do not perform render, render() callback is never called
    view.preventDOM();
 
    // pass controll back to LM, no need to pass arguments.
    done();
  });
 
  // ... or plainly render the template
  return template( context );
}