code: def __init__(self, full_size=1000):
      self.full_size = full_size
  
imports: import unittest
  import torch
  from classy_vision.dataset import build_dataset, register_dataset
  from classy_vision.dataset.classy_video_dataset import ClassyVideoDataset, MaxLengthClipSampler
  from classy_vision.dataset.core import ListDataset
  from classy_vision.dataset.transforms.util_video import build_video_field_transform_default
  from torch.utils.data import Sampler
label_desc: Use image node_id 1 to create a new MockClipSampler object from inherited base classes: Sampler with example: obj = MockClipSampler(full_size)