title: Creating a struct field in a row of a dataframe
body: <p>I have the code below where I'm trying to create a Spark DataFrame with a field that is a struct.  What should I replace <code>???</code> with to get this to work.</p>
  
  <pre><code>import org.apache.spark.sql.types._
  import org.apache.spark.sql.{DataFrame, Row, SparkSession}
  
  val spark: SparkSession = SparkSession.builder()
    .appName("NodesLanesTest")
    .getOrCreate()
  val someData = Seq(
    Row(1538161836000L, 1538075436000L, "cargo3", 3L, ???("Chicago", "1234"))
  )
  val someSchema = StructType(
    List(
      StructField("ata", LongType, nullable = false),
      StructField("atd", LongType, nullable = false),
      StructField("cargo", StringType, nullable = false),
      StructField("createdDate", LongType, nullable = false),
      StructField("destination",
        StructType(List(
          StructField("name", StringType, nullable = false),
          StructField("uuid", StringType, nullable = false)
        ))))
  val someDF = spark.createDataFrame(
    spark.sparkContext.parallelize(someData),
    StructType(someSchema)
  )
  </code></pre>