@Override
    public void retireApi(Api api, IAsyncResultHandler<Void> handler) {
        delegate.retireApi(api, handler);
    }
@see io.apiman.gateway.engine.IRegistry#retireApi(io.apiman.gateway.engine.beans.Api, io.apiman.gateway.engine.async.IAsyncResultHandler)
gateway/engine/core/src/main/java/io/apiman/gateway/engine/impl/SecureRegistryWrapper.java