def format(self, tree):
        output = []
        def ascend(branch, depth=1):
            for parent, grandparents in branch:
                output.append(("    " * depth) + self._format(parent))
                if grandparents:
                    ascend(grandparents, depth + 1)
        ascend(tree)
        return output
Empty init method, to be overridden by modules
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/cherrypy/cherrypy/lib/gctools.py/ReferrerTree.format--crossover with--dataset/ETHPy150Open lmco/laikaboss/laikaboss/si_module.py/SI_MODULE.__init__