def assert_in(member, container, msg=None):
        pass
Checks whether copying exp_src_url into dst_url is not possible.
dataset/ETHPy150Open JetBrains/python-skeletons/nose/tools/__init__.py/assert_in--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/gsutil/gslib/copy_helper.py/CheckForDirFileConflict