code: def test_labeltable():
      img = GiftiImage()
      assert len(img.labeltable.labels) == 0
  
      new_table = GiftiLabelTable()
      new_table.labels += ["test", "me"]
      img.labeltable = new_table
      assert len(img.labeltable.labels) == 2
  
imports: import itertools
  import sys
  import warnings
  from io import BytesIO
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  from nibabel.tmpdirs import InTemporaryDirectory
  from ...None import load
  from ...fileholders import FileHolder
  from ...nifti1 import data_type_codes
  from ...testing import get_test_data
  from ..None import GiftiCoordSystem, GiftiDataArray, GiftiImage, GiftiLabel, GiftiLabelTable, GiftiMetaData, GiftiNVPairs
  from .test_parse_gifti_fast import DATA_FILE1, DATA_FILE2, DATA_FILE3, DATA_FILE4, DATA_FILE5, DATA_FILE6
label_desc: Use image node_id 8 for calling a global function with example usage: test_labeltable() without return types