feat(HP): Frame View HP (#4235)

extensions/cornerstone/src/services/SyncGroupService/SyncGroupService.ts

@@ -98,6 +98,15 @@ export default class SyncGroupService {
     return SynchronizerManager.getSynchronizer(id);
   }
 
+  /**
+   * Registers a custom synchronizer.
+   * @param id - The id of the synchronizer.
+   * @param createFunction - The function that creates the synchronizer.
+   */
+  public registerCustomSynchronizer(id: string, createFunction: SyncCreator): void {
+    this.synchronizerCreators[id] = createFunction;
+  }
+
   /**
    * Retrieves an array of synchronizers of a specific type.
    * @param type - The type of synchronizers to retrieve.