code: def test_serializers():
      assert list(_SERIALIZERS.keys()) == [
          "video",
          "file",
          "pil",
          "int",
          "jpeg",
          "bytes",
          "no_header_numpy",
          "numpy",
          "no_header_tensor",
          "tensor",
          "pickle",
      ]
  
file_path: pytorch-lightning/tests/tests_data/streaming/test_serializer.py
imports: import os
  import sys
  from time import time
  import numpy
  import pytest
  import torch
  from lightning import seed_everything
  from lightning.data.streaming.serializers import _AV_AVAILABLE, _NUMPY_DTYPES_MAPPING, _SERIALIZERS, _TORCH_DTYPES_MAPPING, _TORCH_VISION_AVAILABLE, IntSerializer, NoHeaderNumpySerializer, NoHeaderTensorSerializer, NumpySerializer, PickleSerializer, PILSerializer, TensorSerializer, VideoSerializer
  from lightning_utilities.core.imports import RequirementCache
label_desc: Use image node_id 1 for calling a global function with example usage: test_serializers() without return types