Does TensorRT 4.0 support creating custom layers using the UFF model parser?

I’m trying to import an UFF model file and I need to create a custom layer in TensorRT. samplePlugin demonstrates how to do this using the Caffe parser. Does the UFF model parser support adding custom layers?

UFF parser is being updated to support custom layers.

When we roll out the general availability 4.0 packages in a few weeks they will have a new UFF SSD samples that demonstrates this capability.

Is the UFF SSD sample available yet?