code: def histogram_non_zero(self):
      idx = (
          len(self._histogram)
          - np.cumsum(self._histogram[::-1]).nonzero()[0][0]
      )
      return self._histogram[:idx]
  
file_path: torch-points3d/torch_points3d/utils/debugging_vars.py
imports: import numpy
label_desc: Use image node_id 5 for calling the DistributionNeighbour obj's underlying member method code with example usage: obj.histogram_non_zero() and returns: self