/**
 * Checks if path is a direct property of object.
 *
 * @param object - The object to query
 * @param key - The key to check
 * @returns Whether the property exists
 *
 * @example
 * ```ts
 * const object = { 'a': { 'b': 2 } };
 *
 * has(object, 'a');
 * // => true
 *
 * has(object, 'a.b');
 * // => false
 * ```
 */
export declare function has<T extends object>(object: T, key: string | number | symbol): boolean;
/**
 * Checks if path is a direct or inherited property of object.
 *
 * @param object - The object to query
 * @param key - The key to check
 * @returns Whether the property exists
 *
 * @example
 * ```ts
 * function Foo() {
 *   this.a = 1;
 * }
 *
 * Foo.prototype.b = 2;
 *
 * hasIn(new Foo, 'a');
 * // => true
 *
 * hasIn(new Foo, 'b');
 * // => true
 * ```
 */
export declare function hasIn<T extends object>(object: T, key: string | number | symbol): boolean;
/**
 * Checks if path is a direct property of object.
 * Uses dot notation for nested properties.
 *
 * @param object - The object to query
 * @param path - The path to check
 * @returns Whether the path exists
 *
 * @example
 * ```ts
 * const object = { 'a': { 'b': 2 } };
 *
 * hasPath(object, 'a.b');
 * // => true
 *
 * hasPath(object, ['a', 'b']);
 * // => true
 * ```
 */
export declare function hasPath<T extends object>(object: T, path: string | Array<string | number | symbol>): boolean;
/**
 * Checks if path is a direct or inherited property of object.
 * Uses dot notation for nested properties.
 *
 * @param object - The object to query
 * @param path - The path to check
 * @returns Whether the path exists
 *
 * @example
 * ```ts
 * const object = { 'a': { 'b': 2 } };
 *
 * hasInPath(object, 'a.b');
 * // => true
 *
 * hasInPath(object, ['a', 'b']);
 * // => true
 * ```
 */
export declare function hasInPath<T extends object>(object: T, path: string | Array<string | number | symbol>): boolean;