code: def _get_id_from_left_image(left_image):
      """Returns the id of an image file.
  
      Used to associate an image file
      with its corresponding label.
      Example:
        'bonn_000001_000019_leftImg8bit' -> 'bonn_000001_000019'
  
      Args:
        left_image: left image file name.
  
      Returns:
        id of the image.
      """
      return LEFT_IMAGE_FILE_RE.match(left_image).group(1)
  
file_path: datasets/tensorflow_datasets/datasets/lost_and_found/lost_and_found_dataset_builder.py
imports: from os import path
  import re
  from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow
  import tensorflow_datasets.public_api
label_desc: Use image node_id 1 for calling a global function with example usage: _get_id_from_left_image(left_image) and returns: LEFT_IMAGE_FILE_RE