* @return A valid instance of ListOfStrings.
*/
private ListOfStrings buildListOfStrings()
{
// Create an instance of the ListOfStrings complex type.
ListOfStrings stringList = ListOfStrings.Factory.newInstance();
stringList.setId("001");
// Add two children for the instance's root.
XmlString stringElement = stringList.addNewStringelement();
stringElement.setStringValue("string1");
stringElement = stringList.addNewStringelement();
stringElement.setStringValue("string2");
// Validate the new XML.
if (!validateXml(stringList))
{