assertThat(request.tag<Any>()).isNull()

    // Alternate access APIs also work.
    assertThat(request.tag(String::class)).isSameAs(uuidTag)
  }

  @Test
  fun kotlinClassTag() {
    val uuidTag = "1234"
    val request =
      Request.Builder()
        .url("https://square.com")
        .tag(String::class, uuidTag) // Use the KClass<*> parameter.
        .build()

    // Alternate access APIs also work.
    assertThat(request.tag(UUID::class.java)).isSameAs(uuidTag)
    assertThat(request.tag(UUID::class)).isSameAs(uuidTag)
  }

  @Test
  fun kotlinClassTag() {
    val uuidTag = UUID.randomUUID()
    val request =
      Request.Builder()
        .url("https://square.com")
        .tag(UUID::class, uuidTag) // Use the KClass<*> parameter.
        .build()