YamlRepresenter

import scala.language.implicitConversions

import shampoo.yaml.{ *, given }

case class User(id: Int, name: String, groups: Seq[String])

// Define how to represent YAML from User
given YamlRepresenter[User] =
  user => Yaml.map("id" -> user.id, "name" -> user.name)

val user = User(1000, "lupita")

// Represent and verify
val yaml = Yaml.toYaml(user)
assert(yaml.getInt("id") == 1000)
assert(yaml.getString("name") == "lupita")