parameters: (self, node)
docstring: For identifying trees.
  
          How to identify nodes so we can say "add node to a prior node"?
          Even becomeRoot is an issue.  Use System.identityHashCode(node)
          usually.
docstring_summary: For identifying trees.
docstring_tokens: For identifying trees .
function: def getUniqueID(self, node):
          """For identifying trees.
  
          How to identify nodes so we can say "add node to a prior node"?
          Even becomeRoot is an issue.  Use System.identityHashCode(node)
          usually.
          """
  
          raise NotImplementedError
function_tokens: def getUniqueID ( self , node ) : raise NotImplementedError