@Bean
        public Service wsFederationCallbackService(
            @Qualifier(WebApplicationService.BEAN_NAME_FACTORY)
            final ServiceFactory<WebApplicationService> webApplicationServiceFactory) {
            return webApplicationServiceFactory
                .createService(WSFederationConstants.ENDPOINT_FEDERATION_REQUEST_CALLBACK);
        }
This is {@link CoreWsSecurityIdentityProviderConfiguration}.

@author Misagh Moayyed
@since 5.1.0
support/cas-server-support-ws-idp/src/main/java/org/apereo/cas/config/CoreWsSecurityIdentityProviderConfiguration.java