code: def init_artists(self, ax, plot_args, plot_kwargs):
      xfactors = plot_kwargs.pop("xfactors")
      yfactors = plot_kwargs.pop("yfactors")
      annotations = plot_kwargs.pop("annotations", None)
      prefixes = ["annular", "xmarks", "ymarks"]
      plot_kwargs = {
          k: v
          for k, v in plot_kwargs.items()
          if not any(p in k for p in prefixes)
      }
      artist = ax.pcolormesh(*plot_args, **plot_kwargs)
  
      if self.show_values and annotations:
          self.handles["annotations"] = self._annotate_plot(
              ax, annotations
          )
      self._draw_markers(
          ax,
          self.current_frame,
          self.xmarks,
          plot_args[0],
          xfactors,
          axis="x",
      )
      self._draw_markers(
          ax,
          self.current_frame,
          self.ymarks,
          plot_args[1],
          yfactors,
          axis="y",
      )
      return {"artist": artist}
  
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 6 for calling the HeatMapPlot obj's underlying member method code with example usage: obj.init_artists(ax, plot_args, plot_kwargs) and returns: dict