| During a cloneTree call an updated reference was requested
for a node that did not get cloned. This happens when a sub-graph is
duplicated via cloneTree and has at least one Leaf node
that contains a reference to a Node that has no corresponding node in
the cloned sub-graph. This results in two Leaf nodes wanting to share
access to the same Node.
If dangling references are to be allowed during the cloneTree call,
cloneTree should be called with the
allowDanglingReferences parameter set to true .
See Also: Node.cloneTree |