src/vs/workbench/browser/parts/editor/editorStatus.ts/EditorStatus/updateElement
class EditorStatus:	private updateElement(element: MutableDisposable<IStatusbarEntryAccessor>, props: IStatusbarEntry, id: string, alignment: StatusbarAlignment, priority: number) {
		if (!element.value) {
			element.value = this.statusbarService.addEntry(props, id, alignment, priority);
		} else {
			element.value.update(props);
		}
	}