media/js/vendor/selectize/selectize.js
function(id, data) {
			data[this.settings.optgroupValueField] = id;
			if (id = this.registerOptionGroup(data)) {
				this.trigger('optgroup_add', id, data);
			}
		}
function(id, data) {
			data[this.settings.optgroupValueField] = id;
			if (id = this.registerOptionGroup(data)) {
				this.trigger('optgroup_add', id, data);
			}
		}
function ( id , data ) { data [ this . settings . optgroupValueField ] = id ; if ( id = this . registerOptionGroup ( data ) ) { this . trigger ( 'optgroup_add' , id , data ) ; } }
Registers a new optgroup for options
to be bucketed into.

@param {string} id
@param {object} data
Registers a new optgroup for options to be bucketed into .