@classmethod
def configure(cls):
    """        Return a dynamically created Factory subclass.

        In the Factory base class this serves no functional purpose, however
        subclasses may extend this to provide configuration points.
        For example :class:`~toffee.StormFactory` uses this to allow the user
        to supply the getstore method.
        """
    return type(cls.__name__, (cls,), {})
