code: def test_SDM_is_zero_matrix():
      A = SDM({0: {0: QQ(1)}}, (2, 2), QQ)
      Azero = SDM.zeros((1, 2), QQ)
      assert A.is_zero_matrix() is False
      assert Azero.is_zero_matrix() is True
  
imports: from itertools import product
  from sympy.core.singleton import S
  from sympy.external.gmpy import GROUND_TYPES
  from sympy.testing.pytest import raises
  from sympy.polys.domains import QQ, ZZ, EXRAW
  from sympy.polys.matrices.sdm import SDM
  from sympy.polys.matrices.ddm import DDM
  from sympy.polys.matrices.exceptions import DMBadInputError, DMDomainError, DMShapeError
label_desc: Use image node_id 40 for calling a global function with example usage: test_SDM_is_zero_matrix() without return types