import type { NullHandlingMode } from './executeOptions';
/**
 * Normalize a value for null handling based on mode.
 *
 * In unified mode: treat undefined as null
 * In strict mode: preserve distinction
 *
 * @param value - The value to normalize
 * @param mode - Null handling mode ('strict' or 'unified')
 * @returns Normalized value
 */
export declare function normalizeNullValue<T>(value: T | null | undefined, mode: NullHandlingMode): T | null | undefined;
export declare function nullHandlingDefault(): NullHandlingMode;