title: Simplest way to get local milliseconds in a time zone with Joda-Time
body: <p>Currently, to get milliseconds from start of 1970 in a local time zone, I do</p>
  
  <pre><code>long localMillis = dateTime.withZone(timeZone).toLocalDateTime()
      .toDateTime(DateTimeZone.UTC).getMillis();
  </code></pre>
  
  <p>This works, but is there a simpler way to do this?</p>