code: def test_su2_generators_zero_momenta(self) -> None:
      # Test for the case of zero momentum (j=0).
      j = 0
      generators = equivariance_utils.su2_generators(j)
      expected_generators = torch.zeros(
          (3, 1, 1), dtype=torch.complex64
      )
      self.assertTrue(torch.allclose(generators, expected_generators))
  
file_path: deepchem/deepchem/utils/test/test_equivariance_utils.py
imports: import unittest
label_desc: Use image node_id 2 for calling the TestEquivarianceUtils obj's underlying member method code with example usage: obj.test_su2_generators_zero_momenta() without return types