export declare class Client {
    private _targetFrame;
    private static _idOfLastProcedureCall;
    private static _idOfLastInstance;
    private _disposed;
    private _id;
    private _requestedMessages;
    private _listeners;
    private _onMessageDelegate;
    constructor(_targetFrame: HTMLIFrameElement);
    dispose(): void;
    callProcedure<TResult>(name: string, ...args: any[]): Promise<TResult>;
    subscribe(event: string, handler: (...args: any[]) => void): void;
    private _onMessage;
    private _notifySubscribers;
    private _handleProcResponse;
}