def METHOD_NAME(self, plot=None):
    if plot is None:
        plot = self.plot
    # Load the image with the user supplied filename
    image = ImageData.fromfile(self._load_file)
    # Update the plot data. NB we must extract _data from the image
    # for the time being, until ImageData is made more friendly
    self.pd.set_data("imagedata", image._data)
    # Set the title and redraw
    plot.title = os.path.basename(self._load_file)
    plot.request_redraw()