def METHOD_NAME(self, bbox=None):
    """
    Transfer the region of the agg buffer defined by bbox to the display.
    If bbox is None, the entire buffer is transferred.
    """
    if bbox is None:
        self.bitmap = _convert_agg_to_wx_bitmap(self.get_renderer(), None)
        self.gui_repaint()
        return
    l, b, w, h = bbox.bounds
    r = l + w
    t = b + h
    x = int(l)
    y = int(self.bitmap.GetHeight() - t)
    srcBmp = _convert_agg_to_wx_bitmap(self.get_renderer(), None)
    srcDC = wx.MemoryDC()
    srcDC.SelectObject(srcBmp)
    destDC = wx.MemoryDC()
    destDC.SelectObject(self.bitmap)
    destDC.Blit(x, y, int(w), int(h), srcDC, x, y)
    destDC.SelectObject(wx.NullBitmap)
    srcDC.SelectObject(wx.NullBitmap)
    self.gui_repaint()