code: def __init__(self, input_size):
      self.data: List[Tuple[float, bool]] = [
          (1, True),
          (0, False),
          (0.5, True),
      ]
      self.input_size = input_size
  
file_path: doctr/tests/tensorflow/test_datasets_loader_tf.py
imports: from typing import List, Tuple
  import tensorflow
  from doctr.datasets import DataLoader
label_desc: Use image node_id 1 to create a new MockDataset object  with example: obj = MockDataset(input_size)