import { CallContext } from './CallContext';
import { CallIdRef } from './CallIdRef';
import { CallCommon } from './BetaToStableTypes';
/**
 * @private
 */
export declare class PPTLiveSubscriber {
    private _callIdRef;
    private _context;
    private _pptLive;
    private _call;
    constructor(callIdRef: CallIdRef, context: CallContext, call: CallCommon);
    private subscribe;
    unsubscribe: () => void;
    private isAvailableChanged;
    private checkAndUpdatePPTLiveParticipant;
}
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