code: def func_out_bool_test_data(self):
      smoke_data = [
          dict(func_name="is_array", args=[gs.ones(2)], expected=True),
          dict(func_name="is_array", args=([1, 2],), expected=False),
          dict(func_name="is_array", args=(1,), expected=False),
      ]
  
      return self.generate_tests(smoke_data)
  
file_path: geomstats/tests/tests_geomstats/test_backend/data/backend.py
imports: import geomstats.backend
  from geomstats.geometry.matrices import Matrices
  from geomstats.geometry.spd_matrices import SPDMatrices
  from geomstats.geometry.special_orthogonal import SpecialOrthogonal
  from geomstats.geometry.symmetric_matrices import SymmetricMatrices
  from geomstats.test.data import TestData
label_desc: Use image node_id 9 for calling the BackendTestData obj's underlying member method code with example usage: obj.func_out_bool_test_data() and returns: self