*/
  var protocols: List<Protocol> = immutableListOf(Protocol.HTTP_2, Protocol.HTTP_1_1)
    set(value) {
      val protocolList = value.toImmutableList()
      require(Protocol.H2_PRIOR_KNOWLEDGE !in protocolList || protocolList.size == 1) {
        "protocols containing h2_prior_knowledge cannot use other protocols: $protocolList"
      }

  }

  @JvmName("-deprecated_protocols")
  @Deprecated(
    message = "moved to var",
    replaceWith = ReplaceWith(expression = "run { this.protocols = protocols }"),
    level = DeprecationLevel.ERROR,
  )
  fun setProtocols(protocols: List<Protocol>) {
    delegate.protocols = protocols
  }

  @JvmName("-deprecated_protocols")
  @Deprecated(
    message = "moved to var",