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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 job(self):
 """REST binding for the job associated with the submitted build. Returns: Job: REST binding for running job or ``None`` if connection information was not available or no job was submitted. """

        if self._submitter and hasattr(self._submitter, '_job_access'):
            return self._submitter._job_access()
        return None