code: def __init__(self, batches):
      self.num_batches = len(batches)
      super().__init__(batches)
  
file_path: lightning-flash/src/flash/pointcloud/detection/open3d_ml/backbones.py
imports: import os
  from abc import ABC
  from typing import Callable
  import torch
  from pytorch_lightning.utilities.cloud_io import load
  from flash.core.registry import FlashRegistry
  from flash.core.utilities.imports import _TOPIC_POINTCLOUD_AVAILABLE
  from flash.core.utilities.providers import _OPEN3D_ML
  from flash.core.utilities.url_error import catch_url_error
label_desc: Use image node_id 1 to create a new ObjectDetectBatchCollator object from inherited base classes: ObjectDetectBatch with example: obj = ObjectDetectBatchCollator(batches)