code: def _draw_rubberband(self, rect):
      self._rubberband_rect = rect
      # TODO: Only update the rubberband area.
      self.queue_draw()
  
imports: import functools
  import io
  import os
  import matplotlib
  from matplotlib import _api, backend_tools, cbook
  from matplotlib.backend_bases import ToolContainerBase, KeyEvent, LocationEvent, MouseEvent, ResizeEvent, CloseEvent
  from gi.repository import Gio, GLib, Gtk, Gdk, GdkPixbuf
  from .None import _backend_gtk
  from ._backend_gtk import _BackendGTK, _FigureCanvasGTK, _FigureManagerGTK, _NavigationToolbar2GTK, TimerGTK
label_desc: Use image node_id 17 for calling the FigureCanvasGTK4 obj's underlying member method code with example usage: obj._draw_rubberband(rect) without return types