`xl.meta` is a new self describing backend format used by MinIO to support AWS S3 compatible versioning.
This file is the source of truth for each `version` at rest. `xl.meta` is a msgpack file serialized from a
well defined data structure. To understand `xl.meta` here are the few things to start with

`xl.meta` carries first 8 bytes an XL header which describes the current format and the format version,

    }

    /**
     * Writes setup data in wire format
     * @param dst destination buffer
     * @param dstIndex starting index in destination buffer
     * @return number of bytes written
     */
    protected abstract int writeSetupWireFormat(byte[] dst, int dstIndex);

    /**
     * Writes parameters in wire format
     * @param dst destination buffer

  private fun assertDateInRange(
    minimum: Long,
    actual: Long,
    maximum: Long,
  ) {
    assertThat(actual, "${format(minimum)} <= ${format(actual)} <= ${format(maximum)}")
      .isBetween(minimum, maximum)
  }

  private fun format(time: Long) = SimpleDateFormat("HH:mm:ss.SSS").format(Date(time))

    }

    /**
     * Encodes a small integer (1 byte) in NDR format.
     *
     * @param s the small integer value to encode
     */
    public void enc_ndr_small(final int s) {
        this.buf[this.index] = (byte) (s & 0xFF);
        advance(1);
    }

    /**
     * Decodes a small integer (1 byte) from NDR format.
     *
     * @return the decoded small integer value
     */

		formats: FormatUSTAR | FormatPAX,
	}, {
		header:  &Header{Size: 077777777777, Format: FormatGNU},
		formats: FormatGNU,
	}, {
		header:  &Header{Size: 077777777777 + 1},
		paxHdrs: map[string]string{paxSize: "8589934592"},
		formats: FormatPAX | FormatGNU,
	}, {
		header:  &Header{Size: 077777777777 + 1, Format: FormatPAX},
		paxHdrs: map[string]string{paxSize: "8589934592"},
		formats: FormatPAX,

      stream.writeObject(entry.getValue());
    }
  }

  /**
   * Populates a map by reading an input stream, as part of deserialization. See {@link #writeMap}
   * for the data format.
   */
  static <K extends @Nullable Object, V extends @Nullable Object> void populateMap(
      Map<K, V> map, ObjectInputStream stream) throws IOException, ClassNotFoundException {
    int size = stream.readInt();

        // Verify the string format
        assertNotNull(result);
        assertTrue(result.contains("FessUserTimeZoneProcessProvider"));
        assertTrue(result.contains("useTimeZoneHandling=false"));
        assertTrue(result.contains("acceptCookieTimeZone=false"));
        assertTrue(result.contains("@"));

        // Verify that hashCode is included in hex format

     * <p>
     * The log message should be created using the {@link #format(String, Object...)} method.
     * It is convenient to use a static import for {@link #format(String, Object...)}.
     * </p>
     *
     * <pre>
     * import static org.codelibs.core.log.Logger.format;
     *
     * Logger logger = Logger.getLogger(Xxx.class);
     * logger.log(format("DXXX0000", arg1, arg2, arg3), t);
     * </pre>
     *

  /**
   * UTF-8: eight-bit UCS Transformation Format.
   *
   * @deprecated Use {@link StandardCharsets#UTF_8} instead.
   */
  @Deprecated public static final Charset UTF_8 = StandardCharsets.UTF_8;

  /**
   * UTF-16BE: sixteen-bit UCS Transformation Format, big-endian byte order.
   *
   * @deprecated Use {@link StandardCharsets#UTF_16BE} instead.
   */

  /**
   * UTF-8: eight-bit UCS Transformation Format.
   *
   * @deprecated Use {@link StandardCharsets#UTF_8} instead.
   */
  @Deprecated public static final Charset UTF_8 = StandardCharsets.UTF_8;

  /**
   * UTF-16BE: sixteen-bit UCS Transformation Format, big-endian byte order.
   *
   * @deprecated Use {@link StandardCharsets#UTF_16BE} instead.
   */