/**
 * Copyright 2025 IBM Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
declare function isWeakKey(value: unknown): value is WeakKey;
declare class SafeWeakSet extends WeakSet {
    has(value: unknown): boolean;
    add(value: unknown): this;
    delete(value: unknown): boolean;
}
declare class SafeWeakMap<T> extends WeakMap<WeakKey, T> {
    has(value: unknown): boolean;
    get(key: unknown): T | undefined;
    set(key: unknown, value: T): this;
    delete(value: unknown): boolean;
}

export { SafeWeakMap, SafeWeakSet, isWeakKey };