def start(self):
        if self.ds9 is None:
            self.ds9 = ds9.ds9()
Tests line completion heuristic.
dataset/ETHPy150Open ChrisBeaumont/brut/bubbly/viewer.py/BubblyViewer.start--crossover with--dataset/ETHPy150Open ipython/ipython-py3k/IPython/deathrow/oldfrontend/tests/test_linefrontend.py/test_is_complete