/**
 * Custom hook that returns a default value if the provided value is null or undefined.
 *
 * @template T The type of the value.
 * @param value The potentially null or undefined value.
 * @param defaultValue The default value to return if `value` is null or undefined.
 * @returns The original value if it's not null/undefined, otherwise the default value.
 */
export declare function useDefault<T>(value: T | null | undefined, defaultValue: T): T;