private static SAML2Client buildMockSaml2Client() throws Exception {
        val client = new SAML2Client(getSAML2Configuration());
        client.setCallbackUrl("https://cas.example.org/cas/login");
        client.init(true);
        return client;
    }
This is {@link SamlIdPDelegatedClientAuthenticationRequestCustomizerTests}.

@author Misagh Moayyed
@since 6.4.0
support/cas-server-support-saml-idp/src/test/java/org/apereo/cas/support/saml/web/idp/delegation/SamlIdPDelegatedClientAuthenticationRequestCustomizerTests.java