Java provides a System method called currentTimeMillis() that tells you the elapsed time, in milliseconds, since January 1, 1970 (coordinated universal time). It returns a "Long" integer value to you

In this exercise, simply return the value from millis() at the end of your method. VPL's JUnit testing script will examine it and verify that it's within a few milliseconds of the same measurement that it took just before testing your file.