/**
 * 博特SSE管理器
 */
declare class SseManagerUtils {
    static instance: SseManagerUtils;
    private readonly sseRef;
    addCallId(key: string, callId: string): void;
    removeCallId(key: string, callId?: string): void;
    getCallIdsByKey(key: string): Set<string> | undefined;
    static getInstance(): SseManagerUtils;
}
export default SseManagerUtils;