def METHOD_NAME(self, obj):
    obj, mod = butil.modify_mesh(obj, 'SIMPLE_DEFORM', False, deform_method='BEND', deform_axis='Y',
                                 return_mod=True)
    driver = mod.driver_add('angle').driver
    start_angle = uniform(-np.pi / 6, 0)
    driver.expression = repeated_driver(start_angle, start_angle + uniform(np.pi / 4, np.pi / 2), self.freq)