code: def test_maxiter(self):
      ret = dual_annealing(self.func, self.ld_bounds, maxiter=700)
      assert ret.nit <= 700
  
imports: from scipy.optimize import dual_annealing
  from scipy.optimize._dual_annealing import VisitingDistribution
  from scipy.optimize._dual_annealing import ObjectiveFunWrapper
  from scipy.optimize._dual_annealing import EnergyState
  from scipy.optimize._dual_annealing import LocalSearchWrapper
  from scipy.optimize import rosen, rosen_der
  import numpy
  from numpy.testing import assert_equal, TestCase, assert_allclose, assert_array_less
  from pytest import raises
  from scipy._lib._util import check_random_state
label_desc: Use image node_id 21 for calling the TestDualAnnealing obj's underlying member method code with example usage: obj.test_maxiter() without return types