private fun cancelDuringConnect(scheme: String?) {
    server.enqueue(MockResponse.Builder().onRequestStart(Stall).build())
    val cancelDelayMillis = 300L
    val call =
      client.newCall(
        Request(
          server
            .url("/")
            .newBuilder()
            .scheme(scheme!!)
            .build(),
        ),
      )

  - [Known Issues for v1.5.1](#known-issues-for-v151)
- [v1.5.0](#v150)
  - [Downloads for v1.5.0](#downloads-for-v150)
    - [Client Binaries](#client-binaries-8)
    - [Server Binaries](#server-binaries-8)
  - [Major Themes](#major-themes)
  - [Features](#features)
  - [Known Issues](#known-issues)
  - [Notable Changes to Existing Behavior](#notable-changes-to-existing-behavior)
  - [Deprecations](#deprecations)

    public static final String LABELS_NUM = "{labels.num}";

    /** The key of the message: Page Number */
    public static final String LABELS_PN = "{labels.pn}";

    /** The key of the message: Scheme */
    public static final String LABELS_PROTOCOL_SCHEME = "{labels.protocolScheme}";

    /** The key of the message: Purge Bots */
    public static final String LABELS_PURGE_BY_BOTS = "{labels.purgeByBots}";

  - [Downloads](#downloads-4)
  - [Changelog since v1.4.0](#changelog-since-v140)
    - [Other notable changes](#other-notable-changes-10)
- [v1.4.0](#v140)
  - [Downloads](#downloads-5)
  - [Major Themes](#major-themes)
  - [Features](#features)
  - [Known Issues](#known-issues)
  - [Notable Changes to Existing Behavior](#notable-changes-to-existing-behavior)
    - [Deployments](#deployments)

    assertThat(call).contains("prompt=Bar")
    assertThat(call).contains("protocol=http")
    assertThat(call.lowercase(Locale.US))
      .contains("scheme=basic") // lowercase for the RI.
  }

  @Test
  fun allAttributesSetInProxyAuthenticationCallbacks() {
    val calls = authCallsForHeader("Proxy-Authenticate: Basic realm=\"Bar\"")