class_docstr: Thin wrapper around numpy ndarray to expose the interface
  expected by cairocffi. Basically replicates the
  array.array interface.
code: def buffer_info(self):
      return (self.__data, self.__size)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import gzip
  import sys
  import warnings
  import numpy
  from matplotlib.backend_bases import _Backend, FigureCanvasBase, FigureManagerBase, GraphicsContextBase, RendererBase
  from matplotlib.mathtext import MathTextParser
  from matplotlib.path import Path
  from matplotlib.transforms import Affine2D
  from matplotlib.font_manager import ttfFontProperty
label_desc: Use image node_id 2 for calling the ArrayWrapper obj's underlying member method code with example usage: obj.buffer_info() and returns: self,  self