Finding if a node is existing in lower layers Dynamics Ax

UtilEntryLevel getHighestBelowCurLayer(TreeNode _treeNode)
{
UtilEntryLevel layer, highestLayer;
;

for (layer=UtilEntryLevel::sys; layer < UtilEntryLevel::bus; layer++)
{
if (SysTreeNode::isNodeInLayer(_treeNode, layer))
{
highestLayer = layer;
break;
}
}

return highestLayer;
}