if (http2Connection != null) {
      return http2Connection.isHealthy(nowNs)
    }

    val idleDurationNs = withLock { nowNs - idleAtNs }
    if (idleDurationNs >= IDLE_CONNECTION_HEALTHY_NS && doExtensiveChecks) {
      return javaNetSocket.isHealthy(socket.source)
    }

    return true
  }

  /** Refuse incoming streams. */
  @Throws(IOException::class)