code: def test_spread_empty(self):
      spread = Spread([])
      plot = bokeh_renderer.get_plot(spread)
      cds = plot.handles["cds"]
      self.assertEqual(cds.data["x"], [])
      self.assertEqual(cds.data["y"], [])
  
file_path: holoviews/holoviews/tests/plotting/bokeh/test_spreadplot.py
imports: import numpy
  from holoviews.core.spaces import DynamicMap
  from holoviews.element import Spread
  from holoviews.streams import Buffer
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 3 for calling the TestSpreadPlot obj's underlying member method code with example usage: obj.test_spread_empty() without return types