def METHOD_NAME(self, lpad=True):
    super().METHOD_NAME(lpad=lpad)
    polar_file = ref_dir / "ferroelectric_wf/BTO_polar_POSCAR"
    non_polar_file = ref_dir / "ferroelectric_wf/BTO_nonpolar_POSCAR"
    self.bto_polar = Structure.from_file(polar_file)
    self.bto_nonpolar = Structure.from_file(non_polar_file)
    self.wfid = "wfid_" + get_a_unique_id()
    self.ferroelectric_config = {
        "vasp_cmd": ">>vasp_cmd<<",
        "db_file": ">>db_file<<",
        "nimages": 2,
        "relax": True,
        "wfid": self.wfid,
        "add_analysis_task": False,
    }
    self.wf = get_wf_ferroelectric(
        self.bto_polar, self.bto_nonpolar, **self.ferroelectric_config
    )
    untar_test_files()