'Notify all mechanism drivers after subnet creation.
:raises: neutron.plugins.ml2.common.MechanismDriverError
if any mechanism driver create_subnet_postcommit call fails.
Called after the database transaction. If a mechanism driver
raises an exception, then a MechanismDriverError is propagated
to the caller, where the subnet will be deleted, triggering
any required cleanup. There is no guarantee that all mechanism
drivers are called in this case.'

def create_subnet_postcommit(self, context):

    self._call_on_drivers('create_subnet_postcommit', context)
