def METHOD_NAME(cls):
    cls.path = os.path.join(RMG_PATH, "arkane", "data", "CH2CHOOH", "CH2CHOOHscans")
    if not os.path.exists(cls.path):
        zippath = os.path.join(RMG_PATH, "arkane", "data", "CH2CHOOH", "CH2CHOOHscans.zip")
        with zipfile.ZipFile(zippath, "r") as zip_ref:
            zip_ref.extractall(os.path.dirname(cls.path))
    cls.hd2d = HinderedRotor2D(
        calc_path=cls.path, name="r0", torsigma1=1, torsigma2=1, symmetry="b", pivots1=[6, 7], pivots2=[1, 6], top1=[7, 8], top2=[6, 7, 8]
    )