docstr: Overwrite default axis properties handling due to clashing
  categorical input and numerical output axes.
  
  Axis properties are handled separately for radial heatmaps because of
  missing radial axes in bokeh.
code: def _axis_properties(self, *args, **kwargs):
      """Overwrite default axis properties handling due to clashing
      categorical input and numerical output axes.
  
      Axis properties are handled separately for radial heatmaps because of
      missing radial axes in bokeh.
  
      """
  
      return {}
  
imports: import numpy
  import param
  from bokeh.models.glyphs import AnnularWedge
  from ...core.data import GridInterface
  from ...core.spaces import HoloMap
  from ...core.util import dimension_sanitizer, is_nan
  from .element import ColorbarPlot, CompositeElementPlot
  from .selection import BokehOverlaySelectionDisplay
  from .styles import base_properties, fill_properties, line_properties, text_properties
label_desc: Use image node_id 7 for calling the RadialHeatMapPlot obj's underlying member method code with example usage: obj._axis_properties() and returns: dict