code: def test_heatmap_hover_ensure_vdims_sanitized(self):
      hm = HeatMap([(1, 1, 1), (2, 2, 0)], vdims=["z with $pace"]).opts(
          tools=["hover"]
      )
      self._test_hover_info(
          hm,
          [
              ("x", "@{x}"),
              ("y", "@{y}"),
              ("z with $pace", "@{z_with_pace}"),
          ],
      )
  
file_path: holoviews/holoviews/tests/plotting/bokeh/test_heatmapplot.py
imports: import numpy
  from bokeh.models import FactorRange, HoverTool, Range1d
  from holoviews.element import HeatMap, Image, Points
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 3 for calling the TestHeatMapPlot obj's underlying member method code with example usage: obj.test_heatmap_hover_ensure_vdims_sanitized() without return types