XML output could be optimized with already added <field> tag.

Consider expected and actual XML files for the following object:

    public class Value {
        public int i = 10;
        public String s;
    }
    public class Bean {
        private Value value = new Value();
        public Value getValue() { return this.value; }
        public void setValue(Value value) { this.value = value; }
    }
    Bean bean = new Bean();
    bean.getBean().i = 0;
    bean.getBean().s = "name";


Expected:
<?xml version="1.0" encoding="UTF-8"?>
<java version="1.7.0-internal" class="java.beans.XMLDecoder">
 <object class="Bean">
  <void id="Value0" property="value">
   <field name="i">
    <int>0</int>
   </field>
   <field name="s">
    <string>name</string>
   </field>
  </void>
 </object>
</java>


Actual:
<?xml version="1.0" encoding="UTF-8"?>
<java version="1.7.0-internal" class="java.beans.XMLDecoder">
 <object class="Bean">
  <void id="Value0" property="value">
   <void class="Value" method="getField">
    <string>i</string>
    <void method="set">
     <object idref="Value0">
      <void class="Value" method="getField">
       <string>s</string>
       <void method="set">
        <object idref="Value0"/>
        <string>name</string>
       </void>
      </void>
     </object>
     <int>0</int>
    </void>
   </void>
  </void>
 </object>
</java>