code: def test_decollate_layout_streams(self):
      layout = self.dmap_xy + self.dmap_z
      decollated = layout.decollate()
      self.assertIsInstance(decollated, DynamicMap)
      self.assertEqual(decollated.kdims, [])
  
      # Update streams
      decollated.streams[0].event(x=1.0, y=2.0)
      decollated.streams[1].event(z=3.0)
      self.assertEqual(
          decollated[()], Points([1.0, 2.0]) + Points([3.0, 3.0])
      )
      self.assertEqual(
          decollated.callback.callable(dict(x=1.0, y=2.0), dict(z=3.0)),
          Points([1.0, 2.0]) + Points([3.0, 3.0]),
      )
  
imports: from unittest import skipIf
  import param
  from holoviews.core import DynamicMap, GridSpace, HoloMap, NdOverlay, Overlay
  from holoviews.element import Points
  from holoviews.element.comparison import ComparisonTestCase
  from holoviews.streams import PlotSize, RangeXY, Stream
label_desc: Use image node_id 3 for calling the TestDecollation obj's underlying member method code with example usage: obj.test_decollate_layout_streams() without return types