import type { Quonfig } from "../quonfig";
export declare abstract class PeriodicSync<T> {
    protected data: Map<string, T>;
    private startAt;
    private syncIntervalFn;
    protected client: Quonfig;
    private name;
    private timeoutID;
    constructor(client: Quonfig, name: string, syncInterval?: number);
    stop(): void;
    sync(): Promise<void>;
    protected abstract flush(toShip: Map<string, T>, startAtWas: Date): Promise<unknown> | void;
    private prepareData;
    private scheduleNextSync;
    private static calculateSyncInterval;
    protected logInternal(message: string): void;
}