code: def _get_canvas(self, fig):
      return FigureCanvasGTKAgg(fig)
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import matplotlib
  from matplotlib.cbook import warn_deprecated
  from matplotlib.backends.backend_agg import FigureCanvasAgg
  from matplotlib.backends.backend_gtk import gtk, _BackendGTK, FigureCanvasGTK, FigureManagerGTK, NavigationToolbar2GTK, backend_version, error_msg_gtk, PIXELS_PER_INCH
  from matplotlib.backends._gtkagg import agg_to_gtk_drawable
label_desc: Use image node_id 1 for calling the NavigationToolbar2GTKAgg obj's underlying member method code with example usage: obj._get_canvas(fig) and returns: FigureCanvasGTKAgg