declare class InstancePool<T> {
    private allInstances;
    private availableInstances;
    /**
     * Add an instance to the pool
     * @param obj
     * @param isAvailable make it available when true (default: false)
     * @returns
     */
    add(obj: T, isAvailable?: boolean): T;
    /**
     * Check if there are still available instances in the pool.
     * @returns
     */
    isEmpty(): boolean;
    /**
     * Pops one instance from the pool.
     * @throw when the pool of available instances is empty. Use `.isEmpty()` to test.
     * @returns
     *
     */
    pop(): T;
    /**
     * Make all the instances available again
     */
    init(): void;
    /**
     * Remove all elements
     */
    reset(): void;
}
export { InstancePool };