code: def get(self, idx):
      raise NotImplementedError(
          "implement class to get patch or fragment or more"
      )
  
imports: import json
  import logging
  import numpy
  import os
  import os.path
  from plyfile import PlyData
  import shutil
  import torch
  from torch_geometric.data import Dataset, download_url, extract_zip
  from torch_geometric.data import Data
  from torch_points3d.datasets.registration.detector import RandomDetector
  from torch_points3d.datasets.registration.utils import rgbd2fragment_rough
  from torch_points3d.datasets.registration.utils import rgbd2fragment_fine
  from torch_points3d.datasets.registration.utils import compute_overlap_and_matches
  from torch_points3d.datasets.registration.utils import to_list
  from torch_points3d.datasets.registration.utils import files_exist
  from torch_points3d.datasets.registration.utils import makedirs
  from torch_points3d.datasets.registration.utils import get_urls
  from torch_points3d.datasets.registration.utils import PatchExtractor
label_desc: Use image node_id 10 for calling the Base3DMatch obj's underlying member method code with example usage: obj.get(idx) without return types