code: def _make_matrix(self, shape, alpha, beta):
      a = self._make_array(shape, alpha, beta)
      if self.dtype.char in "FD":
          a = a + 1j * self._make_array(shape, alpha, beta)
      return a
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupy import testing
  import cupyx
  from cupyx import cusolver, lapack
label_desc: Use image node_id 2 for calling the TestGesv obj's underlying member method code with example usage: obj._make_matrix(shape, alpha, beta) and returns: a