public/javascript/libs/select2.js
function() {
            var event;

            if (this.opened()) return false;

            if (this._enabled === false || this._readonly === true) return false;

            event = $.Event("select2-opening");
            this.opts.element.trigger(event);
            return !event.isDefaultPrevented();
        }
function() {
            var event;

            if (this.opened()) return false;

            if (this._enabled === false || this._readonly === true) return false;

            event = $.Event("select2-opening");
            this.opts.element.trigger(event);
            return !event.isDefaultPrevented();
        }
abstract