@property
	def value_class(self):
		raise AttributeError("value_class must be defined on %s subclasses." % self.__class__.__name__)
Each :class:`AttributeProxyField` subclass can define a value_class to use for creation of new :class:`.AttributeValue`\ s
dataset/ETHPy150Open ithinksw/philo/philo/models/fields/entities.py/AttributeProxyField.value_class