Is your feature request related to a problem? Please describe.
Got the feedback from Kristopher Kersten:
can any pytorch optimizer be used with MONAI? or does it have to be implemented in the monai.optimizers class?
working with Rhino to convert one of their existing models that uses torch.optim's SGD, and they're not exactly sure how to translate to the Novograd optimizer that's in monai.optimizer, hoping they might just be able to use the torch sgd.
Is this documented somewhere in the MONAI docs? It wasn't obvious to Rhino, and now that I'm digging in a bit trying to help them it also seems not that obvious. Or maybe this is just assumed since it's all based on Pytorch.

I will enhance our highlights doc to make it clear.