code: def _trans_matrix(self, a, trans):
      if trans == "T":
          a = a.T
      elif trans == "H":
          a = a.T.conj()
      return a
  
imports: import numpy
  import pytest
  import cupy
  from cupy import cublas
  from cupy import testing
label_desc: Use image node_id 2 for calling the TestGemmAndGeam obj's underlying member method code with example usage: obj._trans_matrix(a, trans) and returns: a