<Grid>
  <Body>
    <B id="r1">
      <I A="1. row, 1. child"/>
      <I A="1. row, 2. child"/>
      <I A="1. row, 3. child"/>
    </B>
    <B id="r2">
      <I A="2. row, 1. child"/>
      <I A="2. row, 2. child"/>
    </B>
    <B id="b2">
      <I A="4.row"/>
      <I id="r4" A="5.row" Expanded="0" Count="1"/>
    </B>
    <B id="r4">
      <I A="4.row, 1.child"/>
    </B>
    <B id="b3">
      <I A="6.row"/>
      <I A="7.row"/>
      <I A="8.row"/>
    </B>
  </Body>
</Grid>
