code: def _get_printed_image_surface(self):
      self._renderer.dpi = self.figure.dpi
      width, height = self.get_width_height()
      surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height)
      self._renderer.set_context(cairo.Context(surface))
      self.figure.draw(self._renderer)
      return surface
  
imports: import functools
  import gzip
  import math
  import numpy
  from ..None import _api, cbook, font_manager
  from matplotlib.backend_bases import _Backend, FigureCanvasBase, FigureManagerBase, GraphicsContextBase, RendererBase
  from matplotlib.font_manager import ttfFontProperty
  from matplotlib.path import Path
  from matplotlib.transforms import Affine2D
label_desc: Use image node_id 7 for calling the FigureCanvasCairo obj's underlying member method code with example usage: obj._get_printed_image_surface() and returns: surface