code: def test_deep_holoslice(self):
      selection = self.img_map.select(
          a=(1, 3), b=(1, 3), x=(None, 0), y=(None, 0)
      )
      self.assertEqual(selection, self.img_map[1:3, 1:3, :0, :0])
  
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 7 for calling the DimensionedSelectionTest obj's underlying member method code with example usage: obj.test_deep_holoslice() without return types