merge with another model's FeatureObservers and root, and try to split
check whether split the activeNode or not according to Heoffding bound and merit
check whether split the activeNode or not according to Heoffding bound and merit
the node which may be splitted
array of FeatureSplit
Boolean
Update the model, depending on the Instance given for training.
Update the model, depending on the Instance given for training.
the updated Model