/**
 * 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 { ElementTransformer, MultilineElementTransformer, TextFormatTransformer, TextMatchTransformer, Transformer } from './MarkdownTransformers.js';
import { type LexicalNode } from 'lexical';
export declare function indexBy<T>(list: T[], callback: (arg0: T) => string | undefined): Readonly<Record<string, T[]>>;
export declare function transformersByType(transformers: Transformer[]): Readonly<{
    element: ElementTransformer[];
    multilineElement: MultilineElementTransformer[];
    textFormat: TextFormatTransformer[];
    textMatch: TextMatchTransformer[];
}>;
export declare const PUNCTUATION_OR_SPACE: RegExp;
export declare const WHITESPACE: RegExp;
export declare const PUNCTUATION: RegExp;
export declare function isEmptyParagraph(node: LexicalNode): boolean;
export declare function unescapeText(value: string): string;