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kotlinlang

Hey guys!  This might be an anti-pattern in Kotlin.  I want to assure that a variable is initialized _only_ in the constructor and its value will become immutable.  I would do something like that like so:
```
public class Metrics {
  private final StatsDClient statsd;
  ...
  public Metrics(String host, int port) {
    statsd = new MarceloStatsDClient(host, port);
  }
  public void count(String aspect, Long delta, String... tags) {
    statsd.count(aspect, delta, tags);
  }
  ....
}```  How would I do that in Kotlin?