pub(crate) fn std_offset() -> usize {
        unsafe {
            let null = NonNull::<Self>::dangling();
            let base = null.as_ref() as *const Self;
            let std = &raw const null.as_ref().std;

            (std as usize) - (base as usize)
        }
    }
Returns the offset of the `std` property in the class object.
src/types/class_object.rs