demo/amd/rjs/output/unified/marionette-build.js
function(name, definition) {
      var region;
  
      if (definition instanceof Marionette.Region) {
        region = definition;
      } else {
        region = Marionette.Region.buildRegion(definition, Marionette.Region);
      }
  
      this.triggerMethod('before:add:region', name, region);
  
      region._parent = this;
      this._store(name, region);
  
      this.triggerMethod('add:region', name, region);
      return region;
    }
function(name, definition) {
      var region;
  
      if (definition instanceof Marionette.Region) {
        region = definition;
      } else {
        region = Marionette.Region.buildRegion(definition, Marionette.Region);
      }
  
      this.triggerMethod('before:add:region', name, region);
  
      region._parent = this;
      this._store(name, region);
  
      this.triggerMethod('add:region', name, region);
      return region;
    }
Add an individual region to the region manager, and return the region instance