Change XML structure of navigatable range attributes

Currently the navigation range XML looks like this:
<rangeList serialization="custom">
<unserializable-parents/>
<list>
<default>
<size>3</size>
</default>
<int>10</int>
<range>
<range>
<first class="string">a</first>
<second class="string">b</second>
</range>
</range>
<range>
<range>
<first class="string">c</first>
<second class="string">d</second>
</range>
</range>
</list>
</rangeList>

Ideally it should be something like:
<rangeList>
<range>
<first class="string">a</first>
<second class="string">b</second>
</range>
<range>
<first class="string">c</first>
<second class="string">d</second>
</range>
</rangeList>