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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 createRootJob(self, *args, **kwargs):
 """ Create a new job and set it as the root job in this job store :rtype: toil.jobGraph.JobGraph """

        rootJob = self.create(*args, **kwargs)
        self.setRootJob(rootJob.jobStoreID)
        return rootJob