_filterThumbnails: function(variant) {
$('[thumbnail-color]').hide();
if (variant.featured_image != null && variant.featured_image.alt != null) {
var selected_color = variant.featured_image.alt;
var thumbnail_selector = '[thumbnail-color="' + selected_color + '"]';
$(thumbnail_selector).show();
}
else {
$('[thumbnail-color]').show();
}
},