code: def test_collate_ndoverlay(self):
      collated = self.nested_overlay.collate(NdOverlay)
      ndoverlay = NdOverlay(
          self.phase_boundaries, kdims=self.dimensions
      )
      self.assertEqual(collated.kdims, ndoverlay.kdims)
      self.assertEqual(collated.keys(), ndoverlay.keys())
      self.assertEqual(repr(collated), repr(ndoverlay))
  
file_path: holoviews/holoviews/tests/core/test_collation.py
imports: import itertools
  import numpy
  from holoviews.core import Collator, GridSpace, HoloMap, NdOverlay, Overlay
  from holoviews.element import Curve
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 3 for calling the TestCollation obj's underlying member method code with example usage: obj.test_collate_ndoverlay() without return types