diff --git a/arduino-ide-extension/src/browser/theia/core/application-shell.ts b/arduino-ide-extension/src/browser/theia/core/application-shell.ts
index 2e9e8c39..aee7cb2c 100644
--- a/arduino-ide-extension/src/browser/theia/core/application-shell.ts
+++ b/arduino-ide-extension/src/browser/theia/core/application-shell.ts
@@ -34,7 +34,7 @@ export class ApplicationShell extends TheiaApplicationShell {
         super.setLayoutData(layoutData);
     }
 
-    track(widget: Widget): void {
+    protected track(widget: Widget): void {
         if (!this.editorMode.proMode && this.sketch && widget instanceof EditorWidget) {
             if (Sketch.isInSketch(widget.editor.uri, this.sketch)) {
                 widget.title.closable = false;
@@ -43,7 +43,6 @@ export class ApplicationShell extends TheiaApplicationShell {
         super.track(widget);
     }
 
-
     async saveAll(): Promise<void> {
         await super.saveAll();
         await this.commandService.executeCommand(SaveAsSketch.Commands.SAVE_AS_SKETCH.id, { execOnlyIfTemp: true, openAfterMove: true });