@Override
    public void onPlugin(ObjectNode node) throws IOException {
        if (chain.hasMigrators()) {
            logger.info(Messages.i18n.format("DataMigrator.MigratingPlugin", node.get("name"))); //$NON-NLS-1$ //$NON-NLS-2$
            chain.migratePlugin(node);
        }
        writer.writePlugin(node);
    }
@see io.apiman.manager.api.migrator.IReaderHandler#onPlugin(com.fasterxml.jackson.databind.node.ObjectNode)
manager/api/migrator/src/main/java/io/apiman/manager/api/migrator/DataMigrator.java