Fixed displaySet search inside protocolEngine

Packages/ohif-viewerbase/client/lib/classes/metadata/StudyMetadata.js

@@ -89,6 +89,21 @@ export class StudyMetadata extends Metadata {
         }
     }
 
+    /**
+     * Search the associated display sets using the supplied callback as criteria. The callback is passed
+     * two arguments: display set (a ImageSet instance) and index (the integer
+     * index of the display set within the current study)
+     * @param {function} callback The callback function which will be invoked for each display set instance.
+     * @returns {undefined} Nothing is returned.
+     */
+    findDisplaySet(callback) {
+        if (Metadata.isValidCallback(callback)) {
+            return this._displaySets.find((displaySet, index) => {
+                return callback.call(null, displaySet, index);
+            });
+        }
+    }
+
     /**
      * Returns the StudyInstanceUID of the current study.
      */