Github user prabeesh commented on a diff in the pull request:
https://github.com/apache/spark/pull/4178#discussion_r24433999
--- Diff:
external/mqtt/src/main/scala/org/apache/spark/streaming/mqtt/MQTTInputDStream.scala
---
@@ -17,23 +17,23 @@
package org.apache.spark.streaming.mqtt
+import java.io.IOException
+import java.util.concurrent.Executors
+import java.util.Properties
+
+import scala.collection.JavaConversions._
import scala.collection.Map
import scala.collection.mutable.HashMap
-import scala.collection.JavaConversions._
import scala.reflect.ClassTag
-import java.util.Properties
-import java.util.concurrent.Executors
-import java.io.IOException
-
+import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken
import org.eclipse.paho.client.mqttv3.MqttCallback
import org.eclipse.paho.client.mqttv3.MqttClient
import org.eclipse.paho.client.mqttv3.MqttClientPersistence
-import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence
-import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken
import org.eclipse.paho.client.mqttv3.MqttException
import org.eclipse.paho.client.mqttv3.MqttMessage
import org.eclipse.paho.client.mqttv3.MqttTopic
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence
--- End diff --
Actually which is the right
```Scala
import org.eclipse.paho.client.mqttv3.{MqttCallback, MqttClient,
MqttClientPersistence, MqttException, MqttMessage, MqttTopic}
```
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