in assets/js/slick.js [1711:1742]
    Slick.prototype.postSlide = function(index) {
        var _ = this;
        if( !_.unslicked ) {
            _.$slider.trigger('afterChange', [_, index]);
            _.animating = false;
            if (_.slideCount > _.options.slidesToShow) {
                _.setPosition();
            }
            _.swipeLeft = null;
            if ( _.options.autoplay ) {
                _.autoPlay();
            }
            if (_.options.accessibility === true) {
                _.initADA();
                if (_.options.focusOnChange) {
                    var $currentSlide = $(_.$slides.get(_.currentSlide));
                    $currentSlide.attr('tabindex', 0).focus();
                }
            }
        }
    };