pointnet2_utils.gather_operation used for pointbert is not defined

[dominicofthebears]

Hi, i was trying to use the PointBERT version of the model but had a problem with the file "models/pointbert/misc.py", where at line 67 a method called "gather_operation" is used, claiming an import from pointnet2_utils

def fps(data, number):
'''
data B N 3
number int
'''
fps_idx = pointnet2_utils.farthest_point_sample(data, number)
fps_data = pointnet2_utils.gather_operation(data.transpose(1, 2).contiguous(), fps_idx).transpose(1,2).contiguous()
return fps_data

This method doesn't exist at all in the specified file, and the only similar thing i managed to find is a method from PointNext module. Which is the right method to invoke there?