Wrap nodes as a tree.
'com.mattunderscore.tree.root:tree-wrappers:0.0.9'
<dependency>
<groupId>com.mattunderscore.tree.root</groupId>
<artifactId>tree-wrappers</artifactId>
<version>0.0.9</version>
</dependency>
<dependency org="com.mattunderscore.tree.root" name="tree-wrappers" rev="0.0.9"/>
"com.mattunderscore.tree.root", "tree-wrappers", "0.0.9"