code: def check_L(self, array, xp):
      a = xp.asarray(array)
      return xp.linalg.cholesky(a)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  from cupyx import cusolver
  from cupy.cuda import driver
  from cupy.cuda import runtime
  from cupy.linalg import _util
  from cupy import testing
  from cupy.testing import _condition
  import cupyx
label_desc: Use image node_id 1 for calling the TestCholeskyDecomposition obj's underlying member method code with example usage: obj.check_L(array, xp) and returns: xp