`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,

        final int expectedNt = 0xc0000002;
        Optional<Integer> actual = findNtStatus(dosErr);
        assertTrue(actual.isPresent(), String.format("Mapping for %08x should exist", dosErr));
        assertEquals(expectedNt, actual.get(), String.format("NTSTATUS for %08x should be %08x", dosErr, expectedNt));
    }

    @Test
    @DisplayName("Unknown DOS error code yields empty Optional")
    void testUnknownCode() {

    }

    /**
     * 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
     */

            "\\\\s\\s" // Minimum path
    })
    @DisplayName("Should handle various valid path formats")
    void testVariousPathFormats(String path) throws Exception {
        // Given
        Smb2TreeConnectRequest req = new Smb2TreeConnectRequest(mockConfig, path);
        byte[] buffer = new byte[1024];

        return cal;
    }

    /**
     * Adds a new interval rule to the rule list.
     *
     * @param from the start time in HH:MM format
     * @param to the end time in HH:MM format
     * @param days comma-separated list of days (1=Sunday, 7=Saturday)
     * @param delay the delay in milliseconds to apply during this interval
     */

      "content_length": {
        "type": "long"
      },
      "created": {
        "type": "date",
        "format": "date_optional_time"
      },
      "timestamp": {
        "type": "date",
        "format": "date_optional_time"
      },
      "expires": {
        "type": "date",
        "format": "date_optional_time"
      },
      "digest": {
        "type": "text",
        "index": false
      },

      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();

		{"ftp://foo", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
		{"http://server/path?location", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format")},
		{"http://:/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: invalid port number")},
		{"http://:8080/path", Endpoint{}, -1, fmt.Errorf("invalid URL endpoint format: empty host name")},

        return n;
    }

    /**
     * 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) {
        buf[index] = (byte) (s & 0xFF);
        advance(1);
    }

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

	}
}

// TestParseCredentialHeader - validates the format validator and extractor for the Credential header in an aws v4 request.
// A valid format of credential should be of the following format.
// Credential = accessKey + SlashSeparator+ scope
// where scope = string.Join([]string{  currTime.Format(yyyymmdd),
//
//				globalMinioDefaultRegion,
//	              	"s3",
//			        "aws4_request",