import "../_dnt.polyfills.js";
export declare class AsyncMemo<K, V> {
    running: Map<K, Promise<V>>;
    run(key: K, run: () => Promise<V>): Promise<V>;
}
export declare class TimedMemo<K, V> extends AsyncMemo<K, V> {
    readonly ttl: number;
    readonly signal: AbortSignal;
    done: Map<K, V>;
    timers: Set<number>;
    constructor(ttl: number, signal: AbortSignal);
    run(key: K, run: () => Promise<V>, ttl?: number): Promise<V>;
}
export declare class PermanentMemo<K, V> extends AsyncMemo<K, V> {
    done: Map<K, V>;
    run(key: K, run: () => Promise<V>): Promise<V>;
}
export declare class WeakMemo<K, V extends object> extends AsyncMemo<K, V> {
    done: Map<K, WeakRef<V>>;
    finReg: FinalizationRegistry<K>;
    run(key: K, run: () => Promise<V>): Promise<V>;
}