how to save a model as CV?

[peng liu]

To all developers and users

 Following the example section of mlcolvars (https://mlcolvar.readthedocs.io/en/stable/notebooks/examples/ex_DeepLDA.html), 

I apply the deeplda to train the cv describe a protonation process. Now, I want to save this model as CV. And use this cv in plumed. 

I found no save model section in this example. Save model section was located in another example, viz., ex_committor (https://mlcolvar.readthedocs.io/en/stable/notebooks/examples/ex_committor.html).

I see two lines to save model. 

"

model.to_torchscript(f'model_{iter}_q.pt', method='trace') convert_model(f'model_{iter}_q.pt', 45)

"

I just wonder why the second line is needed? Is the first line not sufficient?

Thanks.