code: def setUp(self):
      super().setUp()
  
      # set up dummy data for convenient tests
      x = [f"Seg {idx}" for idx in range(2)]
      y = [f"Ann {idx}" for idx in range(2)]
      self.z = list(range(4))
      self.x, self.y = zip(*product(x, y))
  
      self.wedge_data = [
          ((0.5, 0.5), 0.125, 0.375, 180.0, 360.0),
          ((0.5, 0.5), 0.125, 0.375, 0.0, 180.0),
          ((0.5, 0.5), 0.125, 0.5, 180.0, 360.0),
          ((0.5, 0.5), 0.125, 0.5, 0.0, 180.0),
      ]
  
      self.xticks = [(0.0, "Seg 0"), (3.1415926535897931, "Seg 1")]
      self.yticks = [(0.25, "Ann 0"), (0.375, "Ann 1")]
  
      # set up plot options for convenient tests
      plot_opts = dict(
          start_angle=0,
          max_radius=1,
          radius_inner=0.5,
          radius_outer=0.2,
          radial=True,
      )
  
      opts = dict(HeatMap=plot_opts)
  
      # provide element and plot instances for tests
      self.element = HeatMap((self.x, self.y, self.z)).opts(opts)
  
file_path: holoviews/holoviews/tests/plotting/matplotlib/test_radialheatmap.py
imports: from itertools import product
  import numpy
  from holoviews.core.spaces import HoloMap
  from holoviews.element.raster import HeatMap
  from .test_plot import TestMPLPlot, mpl_renderer
label_desc: Use image node_id 1 for calling the RadialHeatMapPlotTests obj's underlying member method code with example usage: obj.setUp() without return types