open fun resolvePTR(name: String, handler: Handler<AsyncResult<String>>): DnsClient
Try to resolve the PTR record for the given name.
name - the name to resolve the PTR for
handler - the to notify with the . The handler will get notified with the resolved java.lang.String if a record was found. If none was found it will get notified with null. If an error accours it will get failed.
Return
a reference to this, so the API can be used fluently.