export declare class ZveltioRealtime {
    private ws;
    private listeners;
    private baseUrl;
    private reconnectAttempts;
    private maxReconnectAttempts;
    private reconnectTimer;
    constructor(baseUrl: string);
    connect(): void;
    private attemptReconnect;
    subscribe(collection: string, callback: (data: any) => void): () => void;
    disconnect(): void;
}
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