anchor.diff:  
     // There are four [Element]s that might have an Undefined Length value
     // (0xFFFFFFFF), [SQ], [OB], [OW], [UN]. If the length is the Undefined,
  -  // then it searches for the matching [kSequenceDelimitationItem] to
  +  // then it searches for the matching [kSequenceDelimitationItem32Bit] to
     // determine the length. Returns a [kUndefinedLength], which is used for
     // reading the value field of these [Element]s. Returns an [SQ] [Element].
   
     /// Reads an EVR or IVR Sequence. The _readElementMethod detects Sequences.
     Element _readSequence(int code, int headerLength, bool isEVR) {
  -    /// Returns [true] if the [kSequenceDelimitationItem] delimiter is found.
  +    /// Returns [true] if the [kSequenceDelimitationItem32Bit] delimiter is found.
       bool checkForSequenceDelimiter() =>
           _checkForDelimiter(kSequenceDelimitationItem32Bit);
   
  
positive.code:   }
  
    /// Reads the Value Field until the [kSequenceDelimiter] is found.
    int _findEndOfVF(int vfLength) {
      // log.debug1('$rbb _findLength: vfLength(0x${toHex32(vfLength)}})');
      if (vfLength == kUndefinedLength) {
  
negative.code: 
  //TODO: rewrite all comments to reflect current state of code
  
  /* Flush when working
  // Next 3 values are 2x16bit little Endian values as one 32bit value.
  const kItem32Bit = 0xfeff00e0;
  const kSequenceDelimitationItem32Bit = 0xfeffdde0;
  const kItemDelimitationItem32Bit = 0xfeff0de0;
  */
  
  /// The type of the different Value Field readers.  Each [VFReader]
  /// reads the Value Field for a particular Value Representation.
  