def has(self, key):

        return key in self.db_config_keys_name_index
Get all available regions for the EC2 service.
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/configuration.py/ConfigurationObject.has--crossover with--dataset/ETHPy150Open darcyliu/storyboard/boto/ec2/__init__.py/regions