code: def test_get_data_xseparators(self):
      plot = mpl_renderer.get_plot(self.element.opts(xmarks=4))
      data, style, ticks = plot.get_data(
          self.element, {"z": {"combined": (0, 3)}}, {}
      )
      xseparators = data["xseparator"]
      arrays = [
          np.array([[0.0, 0.25], [0.0, 0.5]]),
          np.array([[3.14159265, 0.25], [3.14159265, 0.5]]),
      ]
      self.assertEqual(xseparators, arrays)
  
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 3 for calling the RadialHeatMapPlotTests obj's underlying member method code with example usage: obj.test_get_data_xseparators() without return types