code: def _reformat(self, x):
      return x[[1, 4, 7, 2, 5, 8, 3, 6, 9, 0], :].ravel("F")
  
file_path: statsmodels/statsmodels/tsa/vector_ar/tests/test_svar.py
imports: from statsmodels.compat.platform import PLATFORM_WIN
  import numpy
  from numpy.testing import assert_allclose, assert_almost_equal
  import pytest
  import statsmodels.datasets.macrodata
  from statsmodels.tsa.vector_ar.svar_model import SVAR
label_desc: Use image node_id 2 for calling the TestSVAR obj's underlying member method code with example usage: obj._reformat(x) and returns: x