(inst-ms inst)
Return the number of milliseconds since January 1, 1970, 00:00:00 GMT
(inst-ms (java.util.Date.))
;;=> 1495636054438
(inst-ms (java.time.Instant/now))
;;=> 1495636054438
(inst-ms (java.sql.Date. 1495636054438))
;;=> 1495636054438
(inst-ms (java.sql.Timestamp. 1495636054438))
;;=> 1495636054438