if Unknown
inline fun <T> InlineQueryResultsButton.ifUnknown(block: (InlineQueryResultsButton.Unknown) -> T): T?(source)
inline fun <T> RevenueWithdrawalState.ifUnknown(block: (RevenueWithdrawalState.Unknown) -> T): T?(source)
inline fun <T> ChatMessageReactionUpdated.ifUnknown(block: (ChatMessageReactionUpdated.Unknown) -> T): T?(source)