def get_highest_installed(self, project_name):
        return self.environment[project_name][0].version
Ensures that the 'identity' attribute is not None.
dataset/ETHPy150Open cakebread/yolk/yolk/yolklib.py/Distributions.get_highest_installed--crossover with--dataset/ETHPy150Open rackspace/pyrax/pyrax/__init__.py/_assure_identity