code: def test_cupy_bool_mask(self, xp, sp, dtype):
      a = self._make_matrix(sp, dtype)
      indices = self._make_indices(xp)
      res = a[indices]
      _check_shares_memory(xp, sp, a, res)
      return res
  
imports: import functools
  import itertools
  import numpy
  import pytest
  import cupy
  import cupyx
  from cupy import testing
  from cupy.cuda import runtime
  from cupyx.scipy import sparse
label_desc: Use image node_id 3 for calling the TestBoolMaskIndexing obj's underlying member method code with example usage: obj.test_cupy_bool_mask(xp, sp, dtype) and returns: res