*/
    public final int getByteCount() {
        return this.byteCount;
    }

    /**
     * Gets the total length of this message block
     * @return the length
     */
    public final int getLength() {
        return this.length;
    }

    /**
     * Checks if Unicode encoding is forced for this message
     * @return the forceUnicode
     */
    public boolean isForceUnicode() {

			return nil, 0, 0, err
		}
		var decSize int64
		decSize, err = oi.DecryptedSize()
		if err != nil {
			return nil, 0, 0, err
		}
		var decRangeLength int64
		decRangeLength, err = rs.GetLength(decSize)
		if err != nil {
			return nil, 0, 0, err
		}

		// We define a closure that performs decryption given
		// a reader that returns the desired range of

  }

  private fun Snapshot.assertValue(
    index: Int,
    value: String,
  ) {
    getSource(index).use { source ->
      assertThat(sourceAsString(source)).isEqualTo(value)
      assertThat(getLength(index)).isEqualTo(value.length.toLong())
    }
  }

  private fun sourceAsString(source: Source) = source.buffer().readUtf8()

  private fun Editor.assertInoperable() {

        final Document document = getDocument(data);
        final org.w3c.dom.NodeList metaNodes = document.getElementsByTagName("META");
        String description = null;
        for (int i = 0; i < metaNodes.getLength(); i++) {
            final org.w3c.dom.Element meta = (org.w3c.dom.Element) metaNodes.item(i);
            if ("description".equals(meta.getAttribute("name"))) {
                description = meta.getAttribute("content");