name = name,
      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 16L,
      codec = codec,
    )
  }

  /** Returns an adapter that decodes as the first of a list of available types. */
  fun choice(vararg choices: DerAdapter<*>): DerAdapter<Pair<DerAdapter<*>, Any?>> {
    return object : DerAdapter<Pair<DerAdapter<*>, Any?>> {
      override fun matches(header: DerHeader): Boolean = true