code: def get_size(self, renderer):
      a_rel_size, a_abs_size = self._a.get_size(renderer)
      b_rel_size, b_abs_size = self._b.get_size(renderer)
      return a_rel_size + b_rel_size, a_abs_size + b_abs_size
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import matplotlib.cbook
  from matplotlib.axes import Axes
label_desc: Use image node_id 2 for calling the Add obj's underlying member method code with example usage: obj.get_size(renderer) and returns: unknown,  unknown