import { BaseObservableMap } from "./index";
export declare class ApplyMap<K, V> extends BaseObservableMap<K, V> {
    private _source;
    private _subscription?;
    private _apply?;
    constructor(source: BaseObservableMap<K, V>, apply?: Apply<K, V>);
    hasApply(): boolean;
    setApply(apply?: Apply<K, V>): void;
    applyOnce(apply: Apply<K, V>): void;
    onAdd(key: K, value: V): void;
    onRemove(key: K, value: V): void;
    onUpdate(key: K, value: V, params: any): void;
    onSubscribeFirst(): void;
    onUnsubscribeLast(): void;
    onReset(): void;
    [Symbol.iterator](): Iterator<[K, V]>;
    get size(): number;
    get(key: K): V | undefined;
}
type Apply<K, V> = (key: K, value: V, params?: any) => void;
export {};