perf(segmentation): make segmentation read 3x faster (#3577)

platform/core/src/classes/MetadataProvider.js

@@ -70,6 +70,11 @@ class MetadataProvider {
       SeriesInstanceUID,
       SOPInstanceUID
     );
+
+    if (!instance) {
+      return;
+    }
+
     return (
       (frameNumber && combineFrameInstance(frameNumber, instance)) || instance
     );

platform/core/src/extensions/ExtensionManager.ts

@@ -27,6 +27,7 @@ export type ExtensionConfiguration = Record<string, unknown>;
  */
 export interface ExtensionParams extends ExtensionConstructor {
   extensionManager: ExtensionManager;
+  servicesManager: ServicesManager;
   configuration?: ExtensionConfiguration;
 }
 
@@ -43,6 +44,7 @@ export interface Extension {
   getViewportModule?: (p: ExtensionParams) => unknown;
   getUtilityModule?: (p: ExtensionParams) => unknown;
   getCustomizationModule?: (p: ExtensionParams) => unknown;
+  getSopClassHandlerModule?: (p: ExtensionParams) => unknown;
   onModeEnter?: () => void;
   onModeExit?: () => void;
 }

platform/core/src/services/DisplaySetService/DisplaySetService.ts

@@ -1,3 +1,4 @@
+import { ExtensionManager } from '../../extensions';
 import { InstanceMetadata } from '../../types';
 import { PubSubService } from '../_shared/pubSubServiceInterface';
 import EVENTS from './EVENTS';
@@ -47,6 +48,7 @@ export default class DisplaySetService extends PubSubService {
   };
 
   public activeDisplaySets = [];
+  extensionManager: ExtensionManager;
 
   protected activeDisplaySetsMap = new Map<string, DisplaySet>();