What kind of popover on iPad

The iPad app pdf expert displays popovers which seem to consist only of the header. Which kind of popover is this? I can't find something about it in the Apple docs. But it seems to be a standard UI element. Or is it a custom view?


What kind of popover on iPad
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The iPad app pdf expert displays popovers which seem to consist only of the header. Which kind of popover is this? I can't find something about it in the Apple docs. But it seems to be a standard UI element. Or is it a custom view?

