Tensorboard not found in google AI JupyterLab

[ludusrusso]

Hi,
when i try to run tensorboard using the google.datalab.ml api, like this:

from google.datalab.ml import TensorBoard
TensorBoard().start("gs://{}/flowers/trained_{}".format(BUCKET, MODEL_TYPE))

as used in many notebooks of the repo, in the new Google AI Notebook service, the tensorboard GUI is not reachable and it does not appear in the "tensorboards" tab.

I'm currently able to run it externally using the tensorboard bash command, but I'm wondering if there is a better way to solve the issue inside the notebooks.