Class H2OConnection in Python client supports a large amount of backwards-compatible hidden methods.
Those are now listed in the @BackwardsCompatible annotation applied to the class, and makes use of some hidden fields and functions at the bottom of connection.py file:
A previous comment was saying:
These methods are deprecated since July 2016. Please remove them if it's 2017 already...
So, it's probably time to really remove them.
Some of those deprecated fields and methods are however still used internally, so we should also replace those internal usages.
We can also remove backwards-compatible support for giniCoef in MetricsBase, ModelBase, H2OGridSearch: these are also deprecated since 2016.
Documentation also needs to be updated.