code: @Override
      public DefaultProtocolDef getDefaultProtocol() {
          if (model.getSingle("defaultProtocol") != null) {
              return new DefaultProtocolDefImpl(getDescriptorName(), model, model.getSingle("defaultProtocol"));
          }
          return null;
      }
docs: /* (non-Javadoc)
  @see org.jboss.arquillian.impl.configuration.api.ArquillianDescriptor#getDefaultProtocol()