name: String,
  value: String,
) = apply {
  namesAndValues.add(name)
  namesAndValues.add(value.trim())
}

internal fun Headers.Builder.commonRemoveAll(name: String) =
  apply {
    var i = 0
    while (i < namesAndValues.size) {
      if (name.equals(namesAndValues[i], ignoreCase = true)) {
        namesAndValues.removeAt(i) // name
        namesAndValues.removeAt(i) // value
        i -= 2
      }

    assertThat(headers.value(0)).isEqualTo("OkHttp")
  }

  @Test fun ofMapMakesDefensiveCopy() {
    val namesAndValues = mutableMapOf<String, String>()
    namesAndValues["User-Agent"] = "OkHttp"
    val headers = namesAndValues.toHeaders()
    namesAndValues["User-Agent"] = "Chrome"
    assertThat(headers.value(0)).isEqualTo("OkHttp")
  }

  @Test fun ofMapRejectsNullCharInName() {