'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).'

def display(self, filename=None, view=False):

    return ll.view_dot_graph(self.dot, filename=filename, view=view)
