def _serialize(self, stream):
        raise NotImplementedError("To be implemented in subclass")
Asserts that val is numeric and is less than or equal to other.
dataset/ETHPy150Open gitpython-developers/GitPython/git/objects/util.py/Serializable._serialize--crossover with--dataset/ETHPy150Open ActivisionGameScience/assertpy/assertpy/assertpy.py/AssertionBuilder.is_less_than_or_equal_to