/**
 * An object containing regular expressions for validating formats and units.
 *
 * - `FORMATS`: Matches supported text formats (`plain` or `html`), case-insensitive.
 * - `UNITS`: Matches supported unit types (`paragraphs`, `sentences`, `words`), case-insensitive.
 */
export declare const REGEX: {
    FORMATS: RegExp;
    UNITS: RegExp;
};