@Override
    protected IComponentRegistry createComponentRegistry(IPluginRegistry pluginRegistry) {
        return new ConfigDrivenComponentRegistry(engineConfig, pluginRegistry);
    }
@see io.apiman.gateway.engine.impl.AbstractEngineFactory#createComponentRegistry(io.apiman.gateway.engine.IPluginRegistry)
gateway/engine/core/src/main/java/io/apiman/gateway/engine/impl/ConfigDrivenEngineFactory.java