A PkgBlob in its compact on-disk tuple form, dropping the trailing fields it has nothing to say about (the length says what is there, so no flag needs writing/reading), so a reader that stops earlier keeps working.
A PkgBlob in its compact on-disk tuple form, dropping the trailing fields it has nothing to say about (the length says what is there, so no flag needs writing/reading), so a reader that stops earlier keeps working.