code: function Block() {
  
    if( !(this instanceof Block) )
      return new Block()
  
    /** @type {Number} Entry / compression type */
    this.type = 0x00000000
    /** @type {String} Entry type name */
    this.description = 'UNKNOWN'
    /** @type {String} Comment ('+beg'|'+end' if type == COMMENT) */
    this.comment = ''
    /** @type {Number} Start sector of this chunk */
    this.sectorNumber = 0x0000000000000000
    /** @type {Number} Number of sectors in this chunk */
    this.sectorCount = 0x0000000000000000
    /** @type {Number} Start of chunk in data fork */
    this.compressedOffset = 0x0000000000000000
    /** @type {Number} Chunk's bytelength in data fork */
    this.compressedLength = 0x0000000000000000
  
  }
docs: Mish Blkx Block Descriptor
  @constructor
  @memberOf DMG.Mish
  @return {Block}