import { RangeDataItem } from './types';
/**
 * Sanitizes RangeDataItem by converting ReactNode note values to undefined.
 * This ensures only string values are stored in the widget state.
 *
 * @param item - The RangeDataItem to sanitize
 * @returns A new RangeDataItem with ReactNode note values converted to undefined
 */
export declare function sanitizeRangeDataItem(item: RangeDataItem): RangeDataItem;
/**
 * Sanitizes an array of RangeDataItems by converting ReactNode note values to undefined.
 *
 * @param items - Array of RangeDataItems to sanitize
 * @returns A new array with sanitized RangeDataItems
 */
export declare function sanitizeRangeDataItems(items: RangeDataItem[] | undefined): RangeDataItem[] | undefined;