def get_siblings(self):  # pragma: no cover
        raise NotImplementedError
provide compat for construction of strings to numpy datetime64's with
dataset/ETHPy150Open tabo/django-treebeard/treebeard/models.py/Node.get_siblings--crossover with--dataset/ETHPy150Open pydata/pandas/pandas/compat/numpy_compat.py/np_datetime64_compat