code: def test_libsvm_serializer_file_like(libsvm_serializer):
      libsvm_file_path = os.path.join(
          DATA_DIR, "xgboost_abalone", "abalone"
      )
      with open(libsvm_file_path) as libsvm_file:
          validation_data = libsvm_file.read()
          libsvm_file.seek(0)
          result = libsvm_serializer.serialize(libsvm_file)
          assert result == validation_data
  
imports: from __future__ import absolute_import
  import io
  import json
  import os
  import numpy
  import pytest
  import scipy.sparse
  from sagemaker.serializers import CSVSerializer, NumpySerializer, JSONSerializer, IdentitySerializer, SparseMatrixSerializer, JSONLinesSerializer, LibSVMSerializer, DataSerializer
  from tests.unit import DATA_DIR
label_desc: Use image node_id 42 for calling a global function with example usage: test_libsvm_serializer_file_like(libsvm_serializer) without return types