code: def assert_tractogram_item_equal(t1, t2):
      check_tractogram_item(
          t1, t2.streamline, t2.data_for_streamline, t2.data_for_points
      )
  
imports: import copy
  import operator
  import sys
  import unittest
  import warnings
  from collections import defaultdict
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal, assert_array_equal
  from ...testing import assert_arrays_equal, clear_and_catch_warnings
  from ..None import tractogram
  from ..tractogram import LazyDict, LazyTractogram, PerArrayDict, PerArraySequenceDict, Tractogram, TractogramItem, is_data_dict, is_lazy_dict
label_desc: Use image node_id 6 for calling a global function with example usage: assert_tractogram_item_equal(t1, t2) without return types