code: def test_adjointlayout_iter(self):
      layout = self.view3 << self.view2 << self.view1
      for el, view in zip(layout, [self.view3, self.view2, self.view1]):
          self.assertEqual(el, view)
  
imports: import numpy
  import pytest
  from holoviews import AdjointLayout, Element, GridSpace, HoloMap, Layout, NdLayout, Overlay
  from holoviews.element import Curve, HLine, Image
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 4 for calling the AdjointLayoutTest obj's underlying member method code with example usage: obj.test_adjointlayout_iter() without return types