def getNormal(polypoints):
    return unit_normal(polypoints[0], polypoints[1], polypoints[2])
add everything under `source_root_parent` to the list of source roots
dataset/ETHPy150Open tudelft3d/CityGML2OBJs/polygon3dmodule.py/getNormal--crossover with--dataset/ETHPy150Open dimagi/commcare-hq/fabfile.py/_set_source_root_parent