Contains the reason why access to a certain object must be restricted. Clients are supposed to deny access to the channel if the `platform` field is equal to `all` or to the current platform (`ios`, `android`, `wp`, etc.). Platforms can be concatenated (`ios-android`, `ios-wp`), unknown platforms are to be ignored. The `text` is the error message that should be shown to the user.
|platform|[string](../types/string.md) | Yes|Platform identifier (ios, android, wp, all, etc.), can be concatenated with a dash as separator (`android-ios`, `ios-wp`, etc)|