fix(core): update

ts/classes.looptracker.ts

@@ -0,0 +1,23 @@
+import * as plugins from './classes.plugins.js';
+
+import { ObjectMap } from './classes.objectmap.js';
+
+export class LoopTracker<T> {
+  referenceObjectMap = new ObjectMap<any>();
+  constructor() {
+    // nothing here
+  }
+
+  /**
+   * checks and tracks an object
+   * @param objectArg
+   */
+  checkAndTrack(objectArg: T): boolean {
+    if (!this.referenceObjectMap.checkForObject(objectArg)) {
+      this.referenceObjectMap.add(objectArg);
+      return true;
+    } else {
+      return false;
+    }
+  }
+}