code: def test_orthogonalize_trivial():
      """test that the orthogonalization is OK"""
      X = np.random.randn(100)
      Y = X.copy()
      X = _orthogonalize(X)
      assert_array_equal(Y, X)
  
imports: import warnings
  import numpy
  import pytest
  from numpy.testing import assert_almost_equal, assert_array_equal
  from ..hemodynamic_models import _hrf_kernel, _orthogonalize, _regressor_names, _resample_regressor, _sample_condition, compute_regressor, glover_hrf, glover_time_derivative, spm_dispersion_derivative, spm_hrf, spm_time_derivative
label_desc: Use image node_id 8 for calling a global function with example usage: test_orthogonalize_trivial() without return types