code: def get_renderer(self):
      w, h = self.figure.bbox.size
      key = w, h, self.figure.dpi
      reuse_renderer = self._lastKey == key
      if not reuse_renderer:
          self.renderer = RendererAgg(w, h, self.figure.dpi)
          self._lastKey = key
      return self.renderer
  
imports: from contextlib import nullcontext
  from math import radians, cos, sin
  import numpy
  import matplotlib
  from matplotlib import _api, cbook
  from matplotlib.backend_bases import _Backend, FigureCanvasBase, FigureManagerBase, RendererBase
  from matplotlib.font_manager import fontManager, get_font
  from matplotlib.ft2font import LOAD_FORCE_AUTOHINT, LOAD_NO_HINTING, LOAD_DEFAULT, LOAD_NO_AUTOHINT
  from matplotlib.mathtext import MathTextParser
  from matplotlib.path import Path
  from matplotlib.transforms import Bbox, BboxBase
  from matplotlib.backends._backend_agg import RendererAgg
label_desc: Use image node_id 4 for calling the FigureCanvasAgg obj's underlying member method code with example usage: obj.get_renderer() and returns: self