why does get_lidar_to_ego_transform return np.eye(4) all the time?

[Lu233]

Seems get_lidar_to_ego_transform always return the below result, which seems not correct, any reason for this?

array([[1., 0., 0., 0.], [0., 1., 0., 0.], [0., 0., 1., 0.], [0., 0., 0., 1.]])