code: @Override
      public ApplicationDescriptor webModule(String uri, String contextRoot) {
          Node web = model.createChild("module").createChild("web");
          web.createChild("web-uri").text(uri);
          web.createChild("context-root").text(contextRoot);
          return this;
      }
docs: /*
  (non-Javadoc)
  
  @see org.jboss.shrinkwrap.descriptor.api.spec.ee.application.ApplicationDescriptor#webModule(java.lang.String,
  java.lang.String)