def initializeLarchPlugin(_larch=None):
    if _larch is not None:
         get_materials(_larch)
There should be only 6 items remaining after cleanup.
dataset/ETHPy150Open xraypy/xraylarch/plugins/xray/materials.py/initializeLarchPlugin--crossover with--dataset/ETHPy150Open thornomad/django-hitcount/tests/test_hitcount_cleanup.py/HitCountCleanUp.test_remove_expired_hits