import type { NlqTranslationError } from '../../../types.js';
/**
 * Validates that widget JSON includes a supported `widgetType`.
 *
 * @param rawInput - Raw widget JSON object
 * @returns Validation error, or `null` when `widgetType` is present and valid
 */
export declare function validateWidgetType(rawInput: unknown): NlqTranslationError | null;