我不明白，为什么我得到了一个重载错误内“timers.startTimerWithFixedDelay”。我添加了3个参数，以确保采取正确的方法，但似乎他也发现只有2个参数的方法非常有吸引力。

package main
import akka.actor.typed.{ActorSystem, Behavior}
import akka.actor.typed.receptionist.Receptionist
import akka.actor.typed.scaladsl.Behaviors
import scala.concurrent.duration.{Duration, FiniteDuration, MINUTES}

object Guardian {
  case object Tick

  val start: Behavior[Nothing] =
    Behaviors.setup[Receptionist.Listing] { context =>

      Behaviors.withTimers { timers =>
        timers.startTimerWithFixedDelay(Tick, Tick, FiniteDuration(Duration("3 seconds").toSeconds, MINUTES))
        Behaviors.same
      }

    }.narrow
}

object Application extends App {
  ActorSystem[Nothing](Guardian.start, "system")
}

在TimerScheduler.scala内部，它看起来像，他不能在以下两者之间做出决定：

def startTimerWithFixedDelay(msg: T, delay: FiniteDuration): Unit
def startTimerWithFixedDelay(key: Any, msg: T, delay: FiniteDuration): Unit

他为什么不选参数为3的那个？
编译器错误消息：

[error] ... overloaded method startTimerWithFixedDelay with alternatives:
[error]   (msg: akka.actor.typed.receptionist.Receptionist.Listing,delay: scala.concurrent.duration.FiniteDuration)Unit <and>
[error]   (key: Any,msg: akka.actor.typed.receptionist.Receptionist.Listing,delay: scala.concurrent.duration.FiniteDuration)Unit