import { AdmissionStorage } from "./admission-storage.js";
export declare class AdmissionCapacity extends AdmissionStorage {
    acquire(index: number): number | undefined;
    canAcquire(index: number): boolean;
    canAcquireAfterRelease(index: number, releasingIndex: number): boolean;
    protected canAcquireWithCurrent(index: number, current: number): boolean;
    release(index: number): void;
    protected drainWaiters(key: string): void;
    protected rollbackWaiterAcquire(key: string, beforeAcquire: number): void;
    waitFor(index: number, signal: AbortSignal | undefined, deadline: number | undefined): Promise<number | undefined>;
    inFlight(index: number): number;
    limit(index: number): number | undefined;
}