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function wooslider_lazy_exclude( $blacklisted_classes ) {

		$blacklisted_classes = array(
			'skip-lazy',
			'gazette-featured-content-thumbnail',
			'post-image',
		);

		return $blacklisted_classes;

}
add_filter( 'jetpack_lazy_images_blacklisted_classes', 'wooslider_lazy_exclude' );