diff --git a/src/common/utils/extended-map.ts b/src/common/utils/extended-map.ts
index c8b7ff4c65..c759fa3459 100644
--- a/src/common/utils/extended-map.ts
+++ b/src/common/utils/extended-map.ts
@@ -19,7 +19,7 @@
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-import { action, IEnhancer, IObservableMapInitialValues, ObservableMap } from "mobx";
+import { action, ObservableMap } from "mobx";
 
 export class ExtendedMap<K, V> extends Map<K, V> {
   static new<K, V>(entries?: readonly (readonly [K, V])[] | null): ExtendedMap<K, V> {
@@ -67,34 +67,12 @@ export class ExtendedMap<K, V> extends Map<K, V> {
 }
 
 export class ExtendedObservableMap<K, V> extends ObservableMap<K, V> {
-  constructor(protected getDefault: () => V, initialData?: IObservableMapInitialValues<K, V>, enhancer?: IEnhancer<V>, name?: string) {
-    super(initialData, enhancer, name);
-  }
-
   @action
-  getOrInsert(key: K, val: V): V {
-    if (this.has(key)) {
-      return this.get(key);
-    }
-
-    return this.set(key, val).get(key);
-  }
-
-  @action
-  getOrInsertWith(key: K, getVal: () => V): V {
+  getOrInsert(key: K, getVal: () => V): V {
     if (this.has(key)) {
       return this.get(key);
     }
 
     return this.set(key, getVal()).get(key);
   }
-
-  @action
-  getOrDefault(key: K): V {
-    if (this.has(key)) {
-      return this.get(key);
-    }
-
-    return this.set(key, this.getDefault()).get(key);
-  }
 }
diff --git a/src/main/catalog-sources/kubeconfig-sync.ts b/src/main/catalog-sources/kubeconfig-sync.ts
index c8029a421f..0f481741d6 100644
--- a/src/main/catalog-sources/kubeconfig-sync.ts
+++ b/src/main/catalog-sources/kubeconfig-sync.ts
@@ -255,17 +255,17 @@ async function watchFileChanges(filePath: string): Promise<[IComputedValue<Catal
     depth: stat.isDirectory() ? 0 : 1, // DIRs works with 0 but files need 1 (bug: https://github.com/paulmillr/chokidar/issues/1095)
     disableGlobbing: true,
   });
-  const rootSource = new ExtendedObservableMap<string, ObservableMap<string, RootSourceValue>>(observable.map);
+  const rootSource = new ExtendedObservableMap<string, ObservableMap<string, RootSourceValue>>();
   const derivedSource = computed(() => Array.from(iter.flatMap(rootSource.values(), from => iter.map(from.values(), child => child[1]))));
   const stoppers = new Map<string, Disposer>();
 
   watcher
     .on("change", (childFilePath) => {
       stoppers.get(childFilePath)();
-      stoppers.set(childFilePath, diffChangedConfig(childFilePath, rootSource.getOrDefault(childFilePath)));
+      stoppers.set(childFilePath, diffChangedConfig(childFilePath, rootSource.getOrInsert(childFilePath, observable.map)));
     })
     .on("add", (childFilePath) => {
-      stoppers.set(childFilePath, diffChangedConfig(childFilePath, rootSource.getOrDefault(childFilePath)));
+      stoppers.set(childFilePath, diffChangedConfig(childFilePath, rootSource.getOrInsert(childFilePath, observable.map)));
     })
     .on("unlink", (childFilePath) => {
       stoppers.get(childFilePath)();