Struct UnknownStruct 

pub struct UnknownStruct<const N: usize>(/* private fields */);

An opaque, still-unreversed native structure. This is equivalent to a u8 array, but its use indicates that we know a structure exists and we know its size but we don’t know its purpose or anything else about it.

Don’t use this for values that you don’t believe to be distinct structs at the C++ level; just use [u8; N] directly instead. You can tell when reversing because structs will often be passed into functions using base addresses within their parent structs.