)

  /**
   * ```
   * Extension ::= SEQUENCE  {
   *   extnID      OBJECT IDENTIFIER,
   *   critical    BOOLEAN DEFAULT FALSE,
   *   extnValue   OCTET STRING
   *     -- contains the DER encoding of an ASN.1 value
   *     -- corresponding to the extension type identified
   *     -- by extnID
   * }
   * ```
   */
  internal val extension: BasicDerAdapter<Extension> =