def stop_playing(self):
        raise NotImplementedError
time_fn not inherited
dataset/ETHPy150Open pascalw/Airplayer/airplayer/mediabackends/base_media_backend.py/BaseMediaBackend.stop_playing--crossover with--dataset/ETHPy150Open ioam/param/tests/testdynamicparams.py/TestDynamicTimeDependent.test_dynamic_time_fn_not_inherited