platformViewBackdrop property

Set true when the bar sits over an iOS PlatformView (e.g. a map). The bar background renders via live BackdropFilter (the premium shader can't capture a PlatformView), while the premium indicator refracts the bar's own icons — so premium animations survive over the PlatformView with no quality swap. Defaults to false.

Known limitation: the premium indicator refracts the icon layer via toImageSync, which asserts the captured boundary is clean. While the indicator animates, that layer repaints every frame, so a mid-animation capture can fail and the indicator briefly flashes dark. Negligible at magnification ~1.0 (the default) but grows with magnification. Keep magnification near 1.0 over a PlatformView. (The PlatformView itself can't be captured, so it can't be refracted directly.)