/**
 * @author Thomas Barnekow
 * @license MIT
 */
import { IterableValueTransform } from '@tsdotnet/linq/dist/IterableTransform.js';
import { XAttribute, XElement, XName } from '../internal.js';
/**
 * Returns a function that, for the elements of the source sequence passed to
 * that function, returns the concatenated sequences of attributes of such
 * elements.
 *
 * If a name is provided, the resulting sequence contains only those attributes
 * having a matching name.
 *
 * @param name The optional name used to filter the sequence of attributes.
 * @returns A function that will return a flat sequence of attributes.
 */
export declare function attributes(name?: XName | null): IterableValueTransform<XElement, XAttribute>;