tservice/PrintJob.html">PrintJob</a></code>s.
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The system is responsible for starting and stopping a print service depending on whether
there are active print jobs for the printers managed by the service. The print service
should also perform printer discovery in a timely fashion to ensure good user experience.
The interaction between the system and the print service during printer discovery is
encapsulated by a <code><a href="../../../reference/android/printservice/PrinterDiscoverySession.html">Pri