code: def data(self):
      A = sparse.coo_matrix(
          (
              cupy.asarray([1.0, 2.0, 3.0, 4.0]),
              (cupy.asarray([0, 0, 1, 1]), cupy.asarray([0, 1, 0, 1])),
          )
      )
      B = sparse.coo_matrix(
          (
              cupy.asarray([5.0, 6.0]),
              (cupy.asarray([0, 0]), cupy.asarray([0, 1])),
          )
      )
  
      return A, B
  
imports: import functools
  import re
  from unittest import mock
  import numpy
  import pytest
  import cupy
  from cupy import testing
  from cupy.cuda import runtime
  from cupyx.scipy import sparse
  from cupyx.scipy.sparse import _construct
label_desc: Use image node_id 1 for calling the TestVstack obj's underlying member method code with example usage: obj.data() and returns: A,  B