def _set_creation_counter(self):
        self.creation_counter = BaseManager.creation_counter
        BaseManager.creation_counter += 1
Constructor. 
dataset/ETHPy150Open django/django/django/db/models/manager.py/BaseManager._set_creation_counter--crossover with--dataset/ETHPy150Open nfvlabs/openmano/openvim/ODL.py/OF_conn.__init__