'Get cron job approval identified by approval id, cron id and username.'

@Category('User')
@ArgsType(api_user.ApiGetCronJobApprovalArgs)
@ResultType(api_user.ApiCronJobApproval)
@NoAuditLogRequired()
@Http('GET', '/api/users/<username>/approvals/cron-job/<cron_job_id>/<approval_id>', strip_root_types=False)
def GetCronJobApproval(self, args, token=None):

    raise NotImplementedError()
