&lt;String&gt;     createLetterBodyProductName(String value);
      // type instance factory
 	LetterBody createLetterBody();
 }
 </code></pre>
 <pre>
 public class LetterBody {
        // Mixed content can contain instances of Element classes
        // Name, Quantity and ProductName. Text data is represented as
        // java.util.String for text.
        &#64;XmlMixed 
        &#64;XmlElementRefs({
                &#64;XmlElementRef(name="productName", type=JAXBElement.class),
                &#64;XmlEl