Re: [RFC 16/26] memory: Make flatview_do_translate() return a pointer to MemoryRegionSection

[Zhao Liu]

> Yes, the usual approach is to have a Ref and a RefMut type e.g. Opaque and
> OpaqueMut, and the OpaqueMut type can dereference immutably as an Opaque.
> 
> See std::cell::{Ref, RefMut} for inspiration.
> 

Thanks! I'll dorp Opaque directly for this case. If there're more similar
cases, then we can have a OpaqueRef<>.

Regards,
Zhao