Ammonite usage of generic Enum[T]

EntryGetter.scala

@ import $ivy.`com.beachape::enumeratum:1.5.12`, enumeratum._ 
import $ivy.$                                , enumeratum._

@ class EntryGetter[T <: EnumEntry: Enum] {
    // materialise the Enum[T] and bind it (available via Enum.materializeEnum)
    private val enumCompanion = implicitly[Enum[T]]
    def getEntry(name: String): T = enumCompanion.withName(name)
  } 
defined class EntryGetter

@ {
  sealed trait Light extends EnumEntry
  
  object Light extends Enum[Light] {
    val values = findValues
    case object Red extends Light
    case object Yellow extends Light
    case object Green extends Light
  }
  } 
defined trait Light
defined object Light

@ val getter = new EntryGetter[Light] 
getter: EntryGetter[Light] = ammonite.$sess.cmd1$EntryGetter@74f92d14

@ println(getter.getEntry("Red"))