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Pass updates are an important way to engage with your users after the pass is created. For example,
by updating the balance of a user's card for a purchase made from your app.
To update the way passes are displayed, such as when the logo changes, you only need to update or
patch the transit pass class or use the Google Pay and Wallet Console.
Google propagates this information to every transit pass object associated to the updated
transit pass class.
This is the case for all fields defined at the transit pass class level.
To update a single pass, such as when the transit pass points balance changes,
you need to update or patch a single transit pass object. This is the case for all fields defined at the
transit pass object level.