getTabs
Returns the Inbox tab bar configured in the Pushwoosh Control Panel.
The value is read from memory and is safe to call on the main thread. Like every PushwooshInbox method, it throws when the Pushwoosh plugin has not been initialized yet.
Freshness: the list is already up to date once a loadMessages callback has fired or an com.pushwoosh.inbox.event.InboxMessagesUpdatedEvent has been delivered. There is no separate "tabs changed" event.
Return
the tab bar, or null when the application has no tabs and the Inbox is one feed