02-tiled-gallery-theme-functions.php

/**
 * Change the loaded partial for the carousel-image-args to support Fancybox v3
 */
public function mytheme_jetpack_tiled_gallery_partial ( $file, $name, $context )
{
  // Point to the local partial for the carousel-image-args
  if ( $name === 'carousel-image-args' )
  {
    return get_stylesheet_directory() . "/partials/tiled-gallery-carousel-image-args.php";
  }

  return $file;
}
add_filter( 'jetpack_tiled_gallery_partial', 'mytheme_jetpack_tiled_gallery_partial', 99999, 3 );