def __init__(self, databases=None):
        self._databases = databases
        self._connections = local()
Returns the datastore kind we use for this model.
dataset/ETHPy150Open django/django/django/db/utils.py/ConnectionHandler.__init__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/db/__init__.py/Model.kind