code: def test_ddm_nullspace(name, A, A_null):
      A = A.to_field().to_ddm()
      A_null_found, _ = A.nullspace()
      _check_divided(A_null_found, A_null)
  
file_path: sympy/sympy/polys/matrices/tests/test_nullspace.py
imports: from sympy import ZZ, Matrix
  from sympy.polys.matrices import DM, DomainMatrix
  from sympy.polys.matrices.ddm import DDM
  from sympy.polys.matrices.sdm import SDM
  import pytest
label_desc: Use image node_id 8 for calling a global function with example usage: test_ddm_nullspace(name, A, A_null) without return types