code: def _get_ticks(ticks, ticker):
      if callable(ticker):
          ticks = [(v, l) for v, l in ticks if ticker(l)]
      elif isinstance(ticker, int):
          nth_mark = max([np.ceil(len(ticks) / ticker).astype(int), 1])
          ticks = ticks[::nth_mark]
      elif isinstance(ticker, (tuple, list)):
          nth_mark = max(
              [np.ceil(len(ticks) / len(ticker)).astype(int), 1]
          )
          ticks = [
              (v, tl) for (v, l), tl in zip(ticks[::nth_mark], ticker)
          ]
      elif ticker:
          ticks = list(ticker)
      else:
          ticks = []
      return ticks
  
imports: from itertools import product
  import numpy
  import param
  from matplotlib.collections import LineCollection, PatchCollection
  from matplotlib.patches import Circle, Wedge
  from ...core.data import GridInterface
  from ...core.spaces import HoloMap
  from ...core.util import dimension_sanitizer, is_nan
  from ..mixins import HeatMapMixin
  from .element import ColorbarPlot
  from .raster import QuadMeshPlot
  from .util import filter_styles
label_desc: Use image node_id 4 for calling the RadialHeatMapPlot obj's underlying member method code with example usage: obj._get_ticks(ticks, ticker) and returns: ticks