/**
 * @author Thomas Barnekow
 * @license MIT
 */
import { XContainer, XNode } from '../internal.js';
/**
 * For the elements contained in the source sequence, returns the concatenated
 * sequences of descendant nodes of such elements in document order.
 *
 * @typeParam T The type of the elements of the source sequence.
 * @param source The source sequence of elements.
 * @returns The concatenated, flat sequence of descendant nodes in document order.
 */
export declare function descendantNodes<T extends XContainer>(source: Iterable<T>): Iterable<XNode>;
/**
 * For the elements contained in the source sequence, returns the concatenated
 * sequences of descendant nodes of such elements, including the elements
 * themselves, in document order.
 *
 * @typeParam T The type of the elements of the source sequence.
 * @param source The source sequence of elements.
 * @returns The concatenated, flat sequence of descendant nodes, including
 * the source elements, in document order
 */
export declare function descendantNodesAndSelf<T extends XContainer>(source: Iterable<T>): Iterable<XNode>;