public HttpClient getHttpClient() {
        if (httpClient == null) {
            httpClient = new SAML2HttpClientBuilder().build();
        }
        return httpClient;
    }
<p>Getter for the field <code>httpClient</code>.</p>

@return a {@link HttpClient} object
pac4j-saml/src/main/java/org/pac4j/saml/config/SAML2Configuration.java