For example, initially, there are 10 classes / 10 output neuron in the model and I want to train them for 50 epochs. When I complete training for 50 epochs, I want to add one extra class/output neuron making the total class and output neuron count as 11 and then train for 50 more epochs. This is different from this post 4 because this deals with the output layer neuron instead of the hidden layer.