code: def test_bars_logy(self):
      bars = Bars(
          [("A", 1), ("B", 2), ("C", 3)],
          kdims=["Index"],
          vdims=["Value"],
      )
      plot = bokeh_renderer.get_plot(bars.opts(logy=True))
      source = plot.handles["source"]
      glyph = plot.handles["glyph"]
      y_range = plot.handles["y_range"]
      self.assertEqual(list(source.data["Index"]), ["A", "B", "C"])
      self.assertEqual(source.data["Value"], np.array([1, 2, 3]))
      self.assertEqual(glyph.bottom, 0.01)
      self.assertEqual(y_range.start, 0.01)
      self.assertEqual(y_range.end, 3.348369522101713)
  
imports: import numpy
  from bokeh.models import CategoricalColorMapper, LinearAxis, LinearColorMapper
  from holoviews.core.overlay import NdOverlay, Overlay
  from holoviews.element import Bars
  from holoviews.plotting.bokeh.util import property_to_dict
  from ..utils import ParamLogStream
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 10 for calling the TestBarPlot obj's underlying member method code with example usage: obj.test_bars_logy() without return types