src/vs/workbench/contrib/bulkEdit/browser/preview/bulkEditTree.ts/BulkEditDelegate/getTemplateId
class BulkEditDelegate:	getTemplateId(element: BulkEditElement): string {

		if (element instanceof FileElement) {
			return FileElementRenderer.id;
		} else if (element instanceof TextEditElement) {
			return TextEditElementRenderer.id;
		} else {
			return CategoryElementRenderer.id;
		}
	}