Bayesian : do you have capability to not crush calculations when there is observations in test data not seen in train data

[Sandy4321]

regarding to Bayesian for categorical data
https://github.com/taspinar/siml/blob/master/siml/naive_bayes.py
do you have capability to not crush calculations when there is observations in test data not seen in train data
seems to be this one
https://scikit-learn.org/stable/modules/generated/sklearn.naive_bayes.CategoricalNB.html#sklearn.naive_bayes.CategoricalNB

dose not