/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Decorator to mark classes and methods as experimental.
 * Logs a warning once per item when the class is instantiated or the method is called.
 */
export type Constructor = new (...args: unknown[]) => any;
export declare function experimental<T extends Constructor | object, P extends string | symbol | undefined = undefined>(target: T, propertyKey?: P, descriptor?: PropertyDescriptor): P extends undefined ? T : PropertyDescriptor;