public String takeSnapshot(String seleniumTestId) throws UnirestException {
    /*
     * Takes a snapshot of the screen for the specified test.
     * The output of this function can be used as a parameter for setDescription()
     */
    HttpResponse<JsonNode> response = Unirest.post("http://crossbrowsertesting.com/api/v3/selenium/{seleniumTestId}/snapshots")
            .basicAuth(username, authkey)
            .routeParam("seleniumTestId", seleniumTestId)
            .asJson();
    // grab out the snapshot "hash" from the response
    String snapshotHash = (String) response.getBody().getObject().get("hash");

    return snapshotHash;
}