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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getIdent(self, node):
 """ Get the graph identifier for a node """

        ident = self.getRawIdent(node)
        if ident is not None:
            return ident
        node = self.findNode(node)
        if node is None:
            return None
        return node.graphident