Mixing the configurations

Now, what about mixing configurations? Are you allowed to do this? Yup. Let's look at the following code:

package org.packt.swarm.petstore.catalog;

import org.jboss.shrinkwrap.api.Archive;
import org.wildfly.swarm.Swarm;
import org.wildfly.swarm.datasources.DatasourcesFraction;
import org.wildfly.swarm.undertow.UndertowFraction;

public class Main {

 public static void main(String[] args) throws Exception {
 Swarm swarm = new Swarm();
 
 //1
 ClassLoader cl = Main.class.getClassLoader();
 URL xmlConfig = cl.getResource("standalone.xml");
 swarm.withXMLFile(xmlFile);
 
 //2
 UndertowFraction undertowFraction = new UndertowFraction();
 undertowFraction.applyDefaults();
 undertowFraction.httpPort(12345);
 swarm.fraction(undertowFraction);
 
 //3
 Archive<?> deployment = swarm.createDefaultDeployment();
 deployment.addModule("com.h2database.h2");
...