fun withExplicitBox(
    tagClass: Int = DerHeader.TAG_CLASS_CONTEXT_SPECIFIC,
    tag: Long,
    forceConstructed: Boolean? = null,
  ): BasicDerAdapter<T> {
    val codec =
      object : BasicDerAdapter.Codec<T> {
        override fun decode(reader: DerReader): T = fromDer(reader)

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