docs: protected Response buildSaml2Response(final Object casAssertion,
                                            final RequestAbstractType authnRequest,
                                            final SamlRegisteredService service,
                                            final SamlRegisteredServiceServiceProviderMetadataFacade adaptor,
                                            final HttpServletRequest request,
                                            final String binding,
                                            final MessageContext messageContext) {
          return (Response)
              getSamlResponseBuilderConfigurationContext().getSamlSoapResponseBuilder()
                  .build(authnRequest, request, null, casAssertion, service, adaptor, binding, messageContext);
      }