import type { BlockElement } from 'roosterjs-editor-types';
/**
 * Get the first/last BlockElement of under the root node.
 * If no suitable BlockElement found, returns null
 * @param rootNode The root node to get BlockElement from
 * @param isFirst True to get first BlockElement, false to get last BlockElement
 */
export default function getFirstLastBlockElement(rootNode: Node, isFirst: boolean): BlockElement | null;