# File lib/rufus/scheduler.rb, line 524
    def fetch(job_or_job_id)

      if job_or_job_id.respond_to?(:job_id)
        [ job_or_job_id, job_or_job_id.job_id ]
      else
        [ job(job_or_job_id), job_or_job_id ]
      end
    end