- 'traditional' => 'TraditionalImageGallery',
- 'nolines' => 'NolinesImageGallery',
- 'packed' => 'PackedImageGallery',
- 'packed-hover' => 'PackedHoverImageGallery',
- 'packed-overlay' => 'PackedOverlayImageGallery',
- 'slideshow' => 'SlideshowImageGallery',
+ 'traditional' => TraditionalImageGallery::class,
+ 'nolines' => NolinesImageGallery::class,
+ 'packed' => PackedImageGallery::class,
+ 'packed-hover' => PackedHoverImageGallery::class,
+ 'packed-overlay' => PackedOverlayImageGallery::class,
+ 'slideshow' => SlideshowImageGallery::class,