'Update values of a subnet.
:param context: neutron api request context
:param id: UUID representing the subnet to update.
:param subnet: dictionary with keys indicating fields to update.
valid keys are those that have a value of True for
\'allow_put\' as listed in the
:obj:`RESOURCE_ATTRIBUTE_MAP` object in
:file:`neutron/api/v2/attributes.py`.'

@abc.abstractmethod
def update_subnet(self, context, id, subnet):

    pass
