def clear(cls):
        cls._widgets = {}
        cls._refs = {}
        cls._deps = {}
This test verifies that all Muscle objects are also Cell objects.
dataset/ETHPy150Open AnyMesh/anyMesh-Python/example/urwid/canvas.py/CanvasCache.clear--crossover with--dataset/ETHPy150Open openworm/PyOpenWorm/tests/DataIntegrityTest.py/DataIntegrityTest.test_all_muscles_are_cells