/**
 * A date RANGE drawn as ONE control. The platform declares a range as two
 * `string`/`format: date` properties where the END names its START in `rangeStart`;
 * the answer stays the two date strings, nothing is recombined. Where a pair is
 * drawable as one control (below), `ObjectFields` renders this {@link DateRangeField}
 * — a group with the two ends' labels over two native date inputs — at the START's
 * slot and skips the END; otherwise the two properties draw as two ordinary date
 * fields (a documented, valid layout).
 *
 * {@link dateRangePairs} is the ONE definition of "drawable as one control", reused
 * by every surface so each surface's merge decision agrees.
 */
import type { ReactNode } from 'react';
import type { JsonSchema } from './types';
/** A START/END pair drawable as one range control, resolved off a page's properties. */
export interface DateRangePair {
    readonly startName: string;
    readonly startSchema: JsonSchema;
    readonly endName: string;
    readonly endSchema: JsonSchema;
}
/**
 * The date-range pairs among `properties` that are drawable as ONE control. A pair
 * qualifies when: the END names an existing sibling START in `rangeStart`; BOTH are
 * `format: date`; both carry the SAME `visibleWhen` (deep-equal, or both absent); AND
 * no OTHER field's `visibleWhen` names either end — otherwise merging the pair would
 * leave that field's predicate pointing at a control that no longer draws on its own,
 * so the pair stays two date fields (the documented degrade). `properties` is ONE
 * page's ordered list; a field is used in at most one pair.
 */
export declare function dateRangePairs(properties: readonly (readonly [string, JsonSchema])[]): readonly DateRangePair[];
export declare function DateRangeField({ pair, startValue, endValue, startRequired, endRequired, markRequired, startError, endError, onChangeStart, onChangeEnd, }: {
    readonly pair: DateRangePair;
    readonly startValue: unknown;
    readonly endValue: unknown;
    readonly startRequired: boolean;
    readonly endRequired: boolean;
    readonly markRequired: boolean;
    readonly startError: string | undefined;
    readonly endError: string | undefined;
    readonly onChangeStart: (value: unknown) => void;
    readonly onChangeEnd: (value: unknown) => void;
}): ReactNode;
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