咨询：基于含嵌套样例类的样例类创建DataFrame的实现方法

最近我在做Spark相关开发时，需要实现从包含嵌套样例类的样例类创建DataFrame的功能，目前已经写了一段Scala测试代码，内容如下：

import com.holdenkarau.spark.testing.DatasetSuiteBase
import org.apache.spark.sql.catalyst.expressions.GenericRowWithSchema
import org.apache.spark.sql.{Encoders, Row}
import org.scalatest.FlatSpec

case class Inner(i: Int)
case class Outer(in: Inner)

class MyTest extends FlatSpec with DatasetSuiteBase {
  behavior of "Engine"
  it should "work" in {
    import spark.implicits._
    val input = Seq("alice", "bob").toDF("name")
    val schema = Encoders.product[Outer].schema
    implicit val...
  }
}

内容的提问来源于stack exchange，提问作者pcejrowski