code: def test_is_hpd(self, mat, expected, atol):
      res = self.space.is_hpd(mat, atol=atol)
      self.assertAllEqual(res, expected)
  
imports: from geomstats.test_cases.geometry.base import ComplexMatrixVectorSpaceTestCase
label_desc: Use image node_id 3 for calling the ComplexMatricesTestCase obj's underlying member method code with example usage: obj.test_is_hpd(mat, expected, atol) without return types