type Listener = (event: MessageEvent) => void;
declare class SSEManager {
    private connections;
    getConnection(url: string, init?: EventSourceInit): EventSource;
    releaseConnection(url: string): void;
    addEventListener(url: string, eventName: string, listener: Listener): void;
    removeEventListener(url: string, eventName: string, listener: Listener): void;
}
export declare const sseManager: SSEManager;
export {};