+(defknown %rest-values (t t t) * (always-translatable))
+(defknown %rest-ref (t t t t) * (always-translatable))
+(defknown %rest-length (t t t) * (always-translatable))
+(defknown %rest-null (t t t t) * (always-translatable))
+(defknown %rest-true (t t t) * (always-translatable))