*/
    @JvmField val minimumConcurrentCalls: Int = 0,
    /** How long to wait to retry pre-emptive connection attempts that fail. */
    @JvmField val backoffDelayMillis: Long = 60 * 1000,
    /** How much jitter to introduce in connection retry backoff delays */
    @JvmField val backoffJitterMillis: Int = 100,
  )

    assertThat(formEncode(48)).isEqualTo("0")
    assertThat(formEncode(57)).isEqualTo("9")
    assertThat(formEncode(58)).isEqualTo("%3A")
    assertThat(formEncode(59)).isEqualTo("%3B")
    assertThat(formEncode(60)).isEqualTo("%3C")
    assertThat(formEncode(61)).isEqualTo("%3D")
    assertThat(formEncode(62)).isEqualTo("%3E")
    assertThat(formEncode(63)).isEqualTo("%3F")
    assertThat(formEncode(64)).isEqualTo("%40")

    get() =
      this.withLock {
        if (executorServiceOrNull == null) {
          executorServiceOrNull =
            ThreadPoolExecutor(
              0,
              Int.MAX_VALUE,
              60,
              TimeUnit.SECONDS,
              SynchronousQueue(),
              threadFactory("$okHttpName Dispatcher", false),
            )
        }
        return executorServiceOrNull!!
      }