How to use the @microsoft/signalr/dist/esm/XhrHttpClient.XhrHttpClient function in @microsoft/signalr

export function getHttpClients(): HttpClient[] {
    const httpClients: HttpClient[] = [];
    if (typeof XMLHttpRequest !== "undefined") {
        httpClients.push(new XhrHttpClient(TestLogger.instance));
    }
    if (typeof fetch !== "undefined") {
        httpClients.push(new FetchHttpClient(TestLogger.instance));
    }
    if (Platform.isNode) {
        httpClients.push(new NodeHttpClient(TestLogger.instance));
    }
    return httpClients;
}