code: def __init__(self, *args, **kwargs):
      warn_deprecated(
          "2.2",
          message=(
              "The GTKAgg backend is deprecated. It is "
              "untested and will be removed in Matplotlib "
              "3.0. Use the GTK3Agg backend instead. See "
              "Matplotlib usage FAQ for more info on "
              "backends."
          ),
          alternative="GTK3Agg",
      )
      super(FigureCanvasGTKAgg, self).__init__(*args, **kwargs)
  
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 to create a new FigureCanvasGTKAgg object from inherited base classes: FigureCanvasGTK, FigureCanvasAgg with example: obj = FigureCanvasGTKAgg()