class PortPairGroupManager extends AbstractListenerManager<PortPairGroupEvent, PortPairGroupListener> implements
        PortPairGroupService {

    @Override
    public boolean removePortPairGroup(PortPairGroupId portPairGroupId) {
        checkNotNull(portPairGroupId, PORT_PAIR_GROUP_NULL);

        portPairGroupStore.remove(portPairGroupId);
        if (portPairGroupStore.containsKey(portPairGroupId)) {
            log.debug("The portPairGroup is removed failed whose identifier was {}",
                      portPairGroupId.toString());
            return false;
        }
        return true;
    }

}