/**
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */
import type { DOMConversionMap, DOMExportOutput, EditorConfig, LexicalNode, NodeKey, SerializedElementNode, Spread } from 'lexical';
import { ElementNode } from 'lexical';
export declare function setDefaultHeader(val: string): void;
export declare function setDefaultFooter(val: string): void;
export declare function getHeight(node: LayoutItemNode): number | null;
export declare function getSelectedPage(): LayoutItemNode | null;
export declare function getLastPage(): LayoutItemNode | null;
export declare function getAllLayoutItemNodes(): LayoutItemNode[];
export type SerializedLayoutItemNode = Spread<{
    id: string;
    className: string;
    headerText: string;
    footerText: string;
}, SerializedElementNode>;
export declare class LayoutItemNode extends ElementNode {
    __className: string;
    __id: string;
    __headerText: string;
    __footerText: string;
    static getType(): string;
    setClassName(className: string): this;
    getClassName(): string | undefined;
    removeClassName(className: string): this;
    setHeaderText(text: string): this;
    getHeaderText(): string;
    getFooterText(): string;
    setFooterText(text: string): this;
    static clone(node: LayoutItemNode): LayoutItemNode;
    constructor(className: string, id?: string, headerText?: string, footerText?: string, key?: NodeKey);
    getId(): string;
    prepend(node: LexicalNode): this;
    createDOM(config: EditorConfig): HTMLElement;
    updateDOM(prevNode: LayoutItemNode, dom: HTMLElement): boolean;
    static importDOM(): DOMConversionMap | null;
    static importJSON(SerializedLayoutItemNode: SerializedLayoutItemNode): LayoutItemNode;
    isShadowRoot(): boolean;
    exportJSON(): SerializedLayoutItemNode;
    exportDOM(): DOMExportOutput;
}
export declare function $createLayoutItemNode(className: string): LayoutItemNode;
export declare function $isLayoutItemNode(node: LexicalNode | null | undefined): node is LayoutItemNode;