@Override
    public Class<? extends IDelegateFactory> getLoggerFactoryClass(IPluginRegistry pluginRegistry) {
        return loadConfigClass(GatewayConfigProperties.LOGGER_FACTORY_CLASS,
                IDelegateFactory.class, pluginRegistry, DefaultDelegateFactory.class);
    }
@see io.apiman.gateway.engine.IEngineConfig#getDataEncrypterConfig()
gateway/platforms/war/src/main/java/io/apiman/gateway/platforms/war/WarEngineConfig.java