parameters: (self, tree)
docstring: Duplicate tree recursively, using dupNode() for each node
docstring_summary: Duplicate tree recursively, using dupNode() for each node
docstring_tokens: Duplicate tree recursively using dupNode () for each node
function: def dupTree(self, tree):
          """Duplicate tree recursively, using dupNode() for each node"""
  
          raise NotImplementedError
function_tokens: def dupTree ( self , tree ) : raise NotImplementedError