/**
 * Responsible for handling unread chat messages.
 */
declare class MessagesTracker {
    shake: any;
    unreadMessagesListener: ((count: number) => void) | null;
    constructor(shake: any);
    /**
     * Sets unread messages listener.
     *
     * @param unreadMessagesListener listener
     */
    setUnreadMessagesListener: (unreadMessagesListener: ((count: number) => void) | null) => void;
    /**
     * Triggered when new unread messages event is received.
     *
     * @param count number of unread messages
     * @private
     */
    _onEventReceived: (count: number) => void;
}
export default MessagesTracker;
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