public SecurityTokenServiceClient buildClientForRelyingPartyTokenResponses(final SecurityToken securityToken,
                                                                               final WSFederationRegisteredService service) {
        val sts = buildClientForSecurityTokenRequests(service);
        sts.setOnBehalfOf(securityToken.getToken());
        return sts;
    }
Build client for relying party token responses.

@param securityToken the security token
@param service       the service
@return the security token service client
support/cas-server-support-ws-sts-api/src/main/java/org/apereo/cas/authentication/SecurityTokenServiceClientBuilder.java