export declare class BigMap<K, V> implements Iterable<[K, V]> {
    _maps: Array<Map<K, V>>;
    get [Symbol.toStringTag](): string;
    get size(): number;
    [Symbol.iterator](): IterableIterator<[K, V]>;
    set(key: K, value: V): void;
    has(key: K): boolean;
    get(key: K): V | undefined;
    delete(key: K): boolean;
    clear(): void;
    entries(): IterableIterator<[K, V]>;
    keys(): IterableIterator<K>;
    values(): IterableIterator<V>;
}