AttributeError: module 'nerfacc' has no attribute 'OccGridEstimator'

[udbhavtripathi]

Installed Nerfacc through pip install nerfacc but while using OccGridEstimator I am getting this error:
AttributeError: module 'nerfacc' has no attribute 'OccGridEstimator'

Logs:
Python 3.9.19 | packaged by conda-forge | (main, Mar 20 2024, 12:38:46) [MSC v.1929 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.

import nerfacc
estimator = nerfacc.OccGridEstimator(...)
Traceback (most recent call last):
File "", line 1, in
AttributeError: module 'nerfacc' has no attribute 'OccGridEstimator'