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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 write_graph(self, outfile, manifest):
 """Write the graph to a gpickle file. Before doing so, serialize and include all nodes in their corresponding graph entries. """

        out_graph = _updated_graph(self.graph, manifest)
        nx.write_gpickle(out_graph, outfile)