val peekHeader =
          reader.peekHeader()
            ?: throw ProtocolException("expected time but was exhausted at $reader")

        return when {
          peekHeader.tagClass == Adapters.UTC_TIME.tagClass &&
            peekHeader.tag == Adapters.UTC_TIME.tag -> {
            Adapters.UTC_TIME.fromDer(reader)
          }
          peekHeader.tagClass == Adapters.GENERALIZED_TIME.tagClass &&

  /** Total bytes read thus far. */
  private val byteCount: Long
    get() = countingSource.bytesRead - source.buffer.size

  /** How many bytes to read before [peekHeader] should return false, or -1L for no limit. */
  private var limit = -1L

  /** Type hints scoped to the call stack, manipulated with [withTypeHint]. */
  private val typeHintStack = mutableListOf<Any?>()

  /**

    require(tag >= 0)
  }

  override fun matches(header: DerHeader): Boolean = header.tagClass == tagClass && header.tag == tag

  override fun fromDer(reader: DerReader): T {
    val peekedHeader = reader.peekHeader()
    if (peekedHeader == null || peekedHeader.tagClass != tagClass || peekedHeader.tag != tag) {
      if (isOptional) return defaultValue as T
      throw ProtocolException("expected $this but was $peekedHeader at $reader")

              val member = members[list.size]
              list += member.fromDer(reader)
            }

            if (reader.hasNext()) {
              throw ProtocolException("unexpected ${reader.peekHeader()} at $reader")
            }

            return@withTypeHint construct(list)
          }
        }

        override fun encode(
          writer: DerWriter,
          value: T,
        ) {