type DebounceCallback<T> = (key: string, data: T) => void;
type ExpireCallback<T> = (key: string, data: T) => void;
interface DebouncerOptions<T> {
    delay: number;
    expireAfter?: number;
    maxSize?: number;
    onExpire?: ExpireCallback<T>;
}
export declare class PerKeyDebouncer<T> {
    private map;
    private readonly delay;
    private readonly expireAfter?;
    private readonly maxSize;
    private readonly onExpire?;
    private readonly callback;
    constructor(callback: DebounceCallback<T>, options: DebouncerOptions<T>);
    push(key: string, data: T): void;
    get(key: string): T | undefined;
    has(key: string): boolean;
    cancel(key: string): void;
    flush(key: string): void;
    clear(): void;
    size(): number;
    entries(): [string, T][];
}
export {};