I am wondering if it is based on their own Google HyperTune / Vizier [1, 2] which is modified to better deal with uncertainties or it is an absolutely independe

I am wondering if it is based on their own Google HyperTune / Vizier [1, 2] which is modified to better deal with uncertainties or it is an absolutely independent in-house development. [1] https://cloud.google.com/ml-engine/docs/tensorflow/using-hyperparameter-tuning https://cloud.google.com/ml-engine/docs/tensorflow/using-hyp... [2] https://ai.google/research/pubs/pub46180 https://ai.google/research/pubs/pub46180