src/vs/workbench/browser/parts/views/viewPaneContainer.ts/ViewPaneContainer/saveState
class ViewPaneContainer:	override saveState(): void {
		this.panes.forEach((view) => view.saveState());
		this.storageService.store(this.visibleViewsStorageId, this.length, StorageScope.WORKSPACE, StorageTarget.USER);
	}