Add a way to retrieve a Region as a SharedBuffer

        inline ~SharedBuffer() { }

        inline SharedBuffer(const SharedBuffer&);

        // 16 bytes. must be sized to preserve correct alingment.

        // 16 bytes. must be sized to preserve correct alignment.

        mutable int32_t        mRefs;

                size_t         mSize;

                uint32_t       mReserved[2];