src/vs/workbench/electron-sandbox/parts/titlebar/titlebarPart.ts/TitlebarPart/installMenubar
class TitlebarPart:	protected override installMenubar(): void {
		super.installMenubar();

		if (this.menubar) {
			return;
		}

		if (this.customMenubar) {
			this._register(this.customMenubar.onFocusStateChange(e => this.onMenubarFocusChanged(e)));
		}
	}