code: def __init__(self, figure):
      super().__init__(figure=figure)
      self._bbox_queue = []
  
file_path: matplotlib/lib/matplotlib/backends/backend_gtk3agg.py
imports: import numpy
  from ..None import cbook, transforms
  from .None import backend_agg, backend_gtk3
  from .backend_gtk3 import Gtk, _BackendGTK3
  import cairo
label_desc: Use image node_id 1 to create a new FigureCanvasGTK3Agg object from inherited base classes: backend_agg, backend_gtk3 with example: obj = FigureCanvasGTK3Agg(figure)