/**
 * Context for a {@link ConcurrentCollection} being iterated.
 *
 * @internal
 */
export interface ConcurrentCollectionIterator {
    nextIndex: number;
    endIndex: number;
}
/**
 * A special collection type that can be modified while being iterated. Useful
 * for implementing event listener lists.
 *
 * Can only add at the end of the collection, but can remove from anywhere in
 * the collection (while iterating). Preserves insertion order.
 */
export declare class ConcurrentCollection<V> {
    private readonly iterators;
    private readonly values;
    indexOf(value: V): number;
    forEach(callback: (value: V) => void): void;
    add(value: V): number;
    private shiftBackIterators;
    remove(index: number): boolean;
    removeByValue(value: V): boolean;
    get size(): number;
}