def display(self, filename=None, format='pdf', view=False):
        """
        Plot the CFG.  In IPython notebook, the return image object can be
        inlined.

        The *filename* option can be set to a specific path for the rendered
        output to write to.  If *view* option is True, the plot is opened by
        the system default application for the image format (PDF). *format* can
        be any valid format string accepted by graphviz, default is 'pdf'.
        """
        rawbyt = self.pretty_printer(filename=filename, view=view,
                                     render_format=format, **self.kwargs)
        return rawbyt.decode('utf-8')

        Plot the CFG.  In IPython notebook, the return image object can be
        inlined.

        The *filename* option can be set to a specific path for the rendered
        output to write to.  If *view* option is True, the plot is opened by
        the system default application for the image format (PDF). *format* can
        be any valid format string accepted by graphviz, default is 'pdf'.
        
numba/core/codegen.py