code: def test_get_data(self):
      plot = mpl_renderer.get_plot(self.element)
      data, style, ticks = plot.get_data(
          self.element, {"z": {"combined": (0, 3)}}, {}
      )
      wedges = data["annular"]
      for wedge, wdata in zip(wedges, self.wedge_data):
          self.assertEqual(
              (
                  wedge.center,
                  wedge.width,
                  wedge.r,
                  wedge.theta1,
                  wedge.theta2,
              ),
              wdata,
          )
      self.assertEqual(ticks["xticks"], self.xticks)
      self.assertEqual(ticks["yticks"], self.yticks)
  
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 2 for calling the RadialHeatMapPlotTests obj's underlying member method code with example usage: obj.test_get_data() without return types