def METHOD_NAME(self):
    vm = {
        "x1": {  # ib radius
            "value": "r_fw_ib_in",
        },
        "x2": {  # ob radius
            "value": "r_fw_ob_in",
        },
        "dz": -2,
    }
    config = copy.deepcopy(CONFIG)
    config.update(
        {"param_class": f"{WALL_MODULE_REF}::WallPrincetonD", "variables_map": vm}
    )
    designer = WallSilhouetteDesigner(
        PARAMS, build_config=config, equilibrium=self.eq
    )
    bounding_box = designer.execute().create_shape().bounding_box
    width = bounding_box.x_max - bounding_box.x_min
    assert width == pytest.approx(
        PARAMS["r_fw_ob_in"]["value"] - PARAMS["r_fw_ib_in"]["value"]
    )