In Dataiku v4.2.1, I'm trying to build a multiple (2 or 3) hidden layer neural network model. How do I specify the size of the different layers in the Design interface? With the MLPRegressor class, I can pass a tuple of layers, eg. '(100,50)' , but this or just having comma-separated values, eg. '100,50', gets rejected when I try to launch the training with the error message 'Layer sizes must be positive' (as if not taken into account). When entering different values separated by a CR, a one hidden layer model is trained for each of the values provided, which is expected, but not what I'm looking for.