<PRIVATE
: must-be-running ( threaded-server -- threaded-server )
- dup running-servers get in? [ throw-server-not-running ] unless ;
+ dup running-servers get in? [ server-not-running ] unless ;
: must-not-be-running ( threaded-server -- threaded-server )
- dup running-servers get in? [ throw-server-already-running ] when ;
+ dup running-servers get in? [ server-already-running ] when ;
: add-running-server ( threaded-server -- )
must-not-be-running