in 13..14 -> {
          type = source.readUtf8LineStrict().takeIf { it.isNotEmpty() }
        }

        in 15..17 -> {
          type = null // 'event' on a line of its own
        }

        in 18..19 -> {
          val retryMs = source.readRetryMs()
          if (retryMs != -1L) {
            callback.onRetryChange(retryMs)
          }
        }

        -1 -> {