Get-Java-Time names a function, with lambda list (&OPTIONAL (UNIVERSAL-TIME (GET-UNIVERSAL-TIME*))):
Get the time since the Unix epoch in msec, as used often in Java land.
Note that Java time is Unix time multiplied by 1,000 (ie. time in msec) and is used is some places in the Infinity mode communications.
Defined in file src/types/date+time.lisp.