export declare class PendingPromiseStore {
    private pending;
    private counter;
    add(promise: Promise<any>, resolve?: (value: any) => void): string;
    awaitPending(keys: string[], opts?: {
        rejectInterrupts?: boolean;
    }): Promise<void>;
    awaitAll(): Promise<void>;
    clear(): void;
    /** Position marker for keysSince. Handler dispatch records this
     *  before running a handler body so handler exit can await exactly
     *  the promises the handler launched — awaiting the full set would
     *  deadlock on the async call whose raise is being dispatched. */
    watermark(): number;
    /** Still-pending keys registered at or after the given watermark. */
    keysSince(mark: number): string[];
}