'Shows details for a subnet.
For a full list of available parameters, please refer to the official
API reference:
http://developer.openstack.org/api-ref/networking/v2/index.html#show-subnet-details'

def show_subnet(self, subnet_id, **fields):

    uri = ('/subnets/%s' % subnet_id)
    return self.show_resource(uri, **fields)
