export declare function isString(value: any): value is string;
export declare function isObject(value: any): value is object;
export declare function isFunction(value: any): value is Function;
export declare function isUndefined(value: any): value is undefined;
export declare function mapObj(value: object): Array<any>;
export declare function sumOfArr(value: any[]): number;
export declare function isUndefinedOrNull(value: any): boolean;
export interface INegotiationResponse {
    ConnectionId: string;
    ConnectionToken: string;
    DisconnectTimeout: number;
    KeepAliveTimeout: number;
    ProtocolVersion: string;
    TransportConnectTimeout: number;
    TryWebSockets: boolean;
    Url: string;
}
export interface EventObservers {
    [propName: string]: any;
}
export declare const TransportNameMap: {
    WebSocketTransport: string;
    ServerSentEventsTransport: string;
    LongPollingTransport: string;
    NullTransport: string;
};
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