import type { NullOrUndefined } from "../types";
/**
 * Type guard that checks if a value is defined (not null or undefined).
 *
 * @template T - The type of the value when it is defined
 * @param value - The value to check
 * @returns True if the value is defined (not null or undefined), false otherwise
 */
export declare function isDefined<T>(value: T | NullOrUndefined): value is T;