src/vs/workbench/browser/parts/editor/breadcrumbsControl.ts/FileItem/equals
class FileItem:	equals(other: BreadcrumbsItem): boolean {
		if (!(other instanceof FileItem)) {
			return false;
		}
		return (extUri.isEqual(this.element.uri, other.element.uri) &&
			this.options.showFileIcons === other.options.showFileIcons &&
			this.options.showSymbolIcons === other.options.showSymbolIcons);

	}