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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 _cacheAllJobs(self):
 """ Downloads all jobs in the current job store into self.jobCache. """

        logger.debug('Caching all jobs in job store')
        self._jobCache = {jobGraph.jobStoreID: jobGraph for jobGraph in self._jobStore.jobs()}
        logger.debug('{} jobs downloaded.'.format(len(self._jobCache)))