在解析Json时，如何解决Circe中的递归解码？

import io.circe._
import io.circe.parser._

case class Person(name: String, children: List[Person])

object Person {
  implicit val decoder: Decoder[Person] = Decoder.instance { c =>
    for {
      name <- c.downField("name").as[String]
      children <- c.downField("children").as[List[Person]](decoder)
    } yield Person(name, children)
  }
}

val jsonStr = """
{
  "name": "John",
  "children": [
    {
      "name": "Alice",
      "children": []
    },
    {
      "name": "Bob",
      "children": []
    }
  ]
}
"""

val result = decode[Person](jsonStr)