def METHOD_NAME():
    """Plane drag callback should only be active when depicting as plane."""
    np.random.seed(0)
    data = np.random.random((10, 15, 20))
    layer = Image(data, depiction='volume')
    assert move_plane_along_normal not in layer.mouse_drag_callbacks
    layer.depiction = 'plane'
    assert move_plane_along_normal in layer.mouse_drag_callbacks
    layer.depiction = 'volume'
    assert move_plane_along_normal not in layer.mouse_drag_callbacks