code: func (v *TreeView) GetBinWindow() *gdk.Window {
  	c := C.gtk_tree_view_get_bin_window(v.native())
  	if c == nil {
  		return nil
  	}
  
  	w := &gdk.Window{glib.Take(unsafe.Pointer(c))}
  	return w
  }
docs: // GetBinWindow is a wrapper around gtk_tree_view_get_bin_window().