pub fn some_if_present(s: String) -> Option<String>Expand description
A JDWP string that means “there is none” when it is empty.
The generic-signature commands (DISC-12, #95) answer with an empty string for a member whose class
file carries no Signature attribute, rather than with an error or an absent field. That is the ordinary
case by a wide margin, and left as Some("") it would travel all the way to a caller as a blank type.
Normalising it here means every consumer sees the same None the absence deserves.