demo/amd/rjs/output/unified/marionette-build.js
function(regions) {
      var defaults = {
        regionClass: this.getOption('regionClass'),
        parentEl: _.partial(_.result, this, 'el')
      };
  
      return this.regionManager.addRegions(regions, defaults);
    }
function(regions) {
      var defaults = {
        regionClass: this.getOption('regionClass'),
        parentEl: _.partial(_.result, this, 'el')
      };
  
      return this.regionManager.addRegions(regions, defaults);
    }
internal method to build regions