code: def test_deep_holooverlay_slice(self):
      map_slc = self.overlay_map[1:3, 1:3]
      img_slc = map_slc.map(
          lambda x: x[0:0.5, 0:0.5], [Image, Contours]
      )
      selection = self.overlay_map.select(
          a=(1, 3), b=(1, 3), x=(0, 0.5), y=(0, 0.5)
      )
      self.assertEqual(selection, img_slc)
  
imports: import datetime
  from itertools import product
  import numpy
  import pandas
  from holoviews.core import HoloMap
  from holoviews.element import Contours, Curve, Image
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 8 for calling the DimensionedSelectionTest obj's underlying member method code with example usage: obj.test_deep_holooverlay_slice() without return types