在数据帧的行中创建结构字段

我在下面的代码中尝试创建一个Spark数据帧,其中的字段是一个struct。我应该替换什么 ??? 为了让这个工作。

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)
)