class_docstr: The renderer handles all the drawing primitives using a graphics
  context instance that controls the colors/styles
code: def __getstate__(self):
      # We only want to preserve the init keywords of the Renderer.
      # Anything else can be re-created.
      return {
          "width": self.width,
          "height": self.height,
          "dpi": self.dpi,
      }
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import numpy
  from collections import OrderedDict
  from math import radians, cos, sin
  from matplotlib import cbook, rcParams, __version__
  from matplotlib.backend_bases import _Backend, FigureCanvasBase, FigureManagerBase, RendererBase, cursors
  from matplotlib.cbook import maxdict
  from matplotlib.figure import Figure
  from matplotlib.font_manager import findfont, 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 import colors
  from matplotlib.backends._backend_agg import RendererAgg
  from matplotlib import _png
label_desc: Use image node_id 3 for calling the RendererAgg obj's underlying member method code with example usage: obj.__getstate__() and returns: dict