'Create a subnet.
Create a subnet, which represents a range of IP addresses
that can be allocated to devices
:param context: neutron api request context
:param subnet: dictionary describing the subnet, with keys
as listed in the  :obj:`RESOURCE_ATTRIBUTE_MAP` object
in :file:`neutron/api/v2/attributes.py`.  All keys will
be populated.'

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

    pass
