def is_not_none(self):
        if self.val is None:
            self._err('Expected not <None>, but was.')
        return self
watch the directory path for changes.
dataset/ETHPy150Open ActivisionGameScience/assertpy/assertpy/assertpy.py/AssertionBuilder.is_not_none--crossover with--dataset/ETHPy150Open progrium/pydoozer/examples/doozerdata.py/DoozerData.watch