public long creationTime(TimeUnit unit) {
        return unit.convert(creationTime, TimeUnit.MILLISECONDS);
    }
<p>Returns the time at which this Request was created. This is whatever value was returned by {@link
Timer#currentTimeMillis()} when constructing this.</p>

@param unit The unit to return the time in.
@return The creation time of this Request.
jdisc_core/src/main/java/com/yahoo/jdisc/Request.java