diff --git a/platform/core/src/classes/ImageSet.js b/platform/core/src/classes/ImageSet.js
index 2a4142843..9f4ba7074 100644
--- a/platform/core/src/classes/ImageSet.js
+++ b/platform/core/src/classes/ImageSet.js
@@ -56,6 +56,8 @@ class ImageSet {
     }
   }
 
+  getNumImages = () => this.images.length
+
   getImage(index) {
     return this.images[index];
   }