src/vs/workbench/browser/parts/editor/editorGroupView.ts/EditorGroupView/updateTitleContainer
class EditorGroupView:	private updateTitleContainer(): void {
		this.titleContainer.classList.toggle('tabs', this.accessor.partOptions.showTabs);
		this.titleContainer.classList.toggle('show-file-icons', this.accessor.partOptions.showIcons);
	}