def migration_instance(self):
        return self.migration_class()()
Add a subparser for the create subcommand.
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/South-1.0.2/south/migration/base.py/Migration.migration_instance--crossover with--dataset/ETHPy150Open GeoscienceAustralia/agdc/src/testdb.py/add_create_subcommand