examples/map/js/backbone.marionette.js
function (options) {
    options = options || {};

    this._firstRender = true;
    this._initializeRegions(options);
    
    Marionette.ItemView.prototype.constructor.call(this, options);
  }
function (options) {
    options = options || {};

    this._firstRender = true;
    this._initializeRegions(options);
    
    Marionette.ItemView.prototype.constructor.call(this, options);
  }
function ( options ) { options = options || { } ; this . _firstRender = true ; this . _initializeRegions ( options ) ; Marionette . ItemView . prototype . constructor . call ( this , options ) ; }
Ensure the regions are available when the `initialize` method is called.
Ensure the regions are available when the initialize method is called .