code: def test_distribution_not_filled(self):
      dist = Distribution([1, 1.1, 2.1, 3, 2, 1, 2.2]).opts(
          filled=False
      )
      state = self._get_plot_state(dist)
      self.assertEqual(state["data"][0]["type"], "scatter")
      self.assertEqual(state["data"][0]["mode"], "lines")
      self.assertEqual(state["data"][0].get("fill"), None)
  
file_path: holoviews/holoviews/tests/plotting/plotly/test_distributionplot.py
imports: from unittest import SkipTest
  from holoviews.element import Distribution
  from .test_plot import TestPlotlyPlot
label_desc: Use image node_id 3 for calling the TestDistributionPlot obj's underlying member method code with example usage: obj.test_distribution_not_filled() without return types