/**
 * Check spacing between sentences.
 *
 * @param {Readonly<Options> | null | undefined} [options]
 *   Configuration (optional).
 * @returns
 *   Transform.
 */
export default function retextSentenceSpacing(options?: Readonly<Options> | null | undefined): (tree: Root, file: VFile) => undefined;
export type Root = import('nlcst').Root;
export type VFile = import('vfile').VFile;
/**
 * Configuration.
 */
export type Options = {
    /**
     * Spaces to use (default: `'space'`).
     */
    preferred?: 'double-space' | 'newline' | 'space' | 0 | 1 | 2 | null | undefined;
};