private TreeNode createSubTreeNode(TreeNode parent, String child) {
TreeNode childNode = parent.getChild(child);
if (childNode == null) {
childNode = TreeNodeFactory.createTreeNode(child, null, child);
parent.addChild(childNode);
} else {
// the childNode is found, but ensure that its enabled
enableTreeNode(childNode);
}
return childNode;
}
