`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,

({name:"birthdate",validatorFunction:function(c,d,e){var f="yyyy-mm-dd";d.valAttr("format")?f=d.valAttr("format"):"undefined"!=typeof e.dateFormat&&(f=e.dateFormat);var g=a.formUtils.parseDate(c,f);if(!g)return!1;var h=g[0],i=g[1],j=g[2],k=b(h,i,j),l=(d.valAttr("age-range")||"0-124").split("-");if(d.trigger("ageCalculated",[k]),2!==l.length||!a.isNumeric(l[0])||!a.isNumeric(l[1]))throw new Error("Date range format invalid");return k>=l[0]&&k<=l[1]},errorMessage:"",errorMessageKey:"badDate"})}(a)});...

		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,

	bootstrapTraceMsg("Load IAM format file")
	var iamFmt iamFormat
	path := getIAMFormatFilePath()
	if err := store.loadIAMConfig(ctx, &iamFmt, path); err != nil && !errors.Is(err, errConfigNotFound) {
		// if IAM format
		return err
	}

	if iamFmt.Version >= iamFormatVersion1 {
		// Nothing to do.
		return nil
	}

	bootstrapTraceMsg("Write IAM format file")
	// Save iam format to version 1.

                    type: integer
                    format: int64
                    example: 0
                  page_size:
                    type: integer
                    example: 20
                  page_number:
                    type: integer
                    example: 1
                  record_count:
                    type: integer
                    format: int64
                    example: 31625

     * @see String#format(String, Object...)
     *
     * @param pattern a <a href="../util/Formatter.html#syntax">format string</a>
     * @param args arguments referenced by the format specifiers in the format string
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder format(String pattern, Object... args) {
        return append(String.format(pattern, args));
    }

    /**

<?xml version="1.0"?>
<assembly>
	<id>targz</id>
	<formats>
		<format>tar.gz</format>
	</formats>

	<includeBaseDirectory>false</includeBaseDirectory>

	<componentDescriptors>
		<componentDescriptor>src/main/assemblies/common-bin.xml
		</componentDescriptor>
	</componentDescriptors>

            parent.appendChild(caution);
            Element para = document.createElement("para");
            caution.appendChild(para);
            para.appendChild(document.createTextNode(String.format("Note: This %s is ", type)));
            Element link = document.createElement("ulink");
            para.appendChild(link);
            link.setAttribute("url", "../userguide/feature_lifecycle.html");

    val direction = if (inbound) "<<" else ">>"
    return format(
      "%s 0x%08x %5d %-13s %d",
      direction,
      streamId,
      length,
      formattedType,
      windowSizeIncrement,
    )
  }

  internal fun formattedType(type: Int): String = if (type < FRAME_NAMES.size) FRAME_NAMES[type] else format("0x%02x", type)

  /**

    public LinkMetaData getMethod(String method) {
        MethodLinkMetaData methodMetaData = findMethod(method);
        String urlFragment = methodMetaData.getUrlFragment(className);
        String displayName = String.format("%s.%s", simpleName, methodMetaData.getDisplayName());
        return new LinkMetaData(methodMetaData.style, displayName, urlFragment);
    }

    private MethodLinkMetaData findMethod(String method) {