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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 _createEmptyJobGraphForJob(self, jobStore, command=None, predecessorNumber=0):
 """ Create an empty job for the job. """

        # set _config to determine user determined default values for resource requirements
        self._config = jobStore.config
        return jobStore.create(JobNode.fromJob(self, command=command,
                                               predecessorNumber=predecessorNumber))