r example, if a remote peer doesn't return <i>any</i> data for ten seconds, we may assume that
 the peer is unavailable.

 <p><strong>Deadlines</strong> specify the maximum time to spend on a job,
 composed of one or more operations. Use deadlines to set an upper bound on the time invested on a
 job. For example, a battery-conscious app may limit how much time it spends pre-loading content.</div>
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