code: private String compXmlString(byte[] xml, int sitOff, int stOff, int strInd) {
          if (strInd < 0) return null;
          int strOff = stOff + LEW(xml, sitOff + strInd * 4);
          return compXmlStringAt(xml, strOff);
      }
docs: <p>Get a {@link String} of the value stored in StringTable format at offset strOff, as
  calculated from an initial starting point and a number of words to traverse.
  </p>
  
  @param xml    The {@link Byte} array to be processed.
  @param sitOff An {@link Integer} value indicating the initial offset within the supplied
  {@link Byte} array.
  @param stOff  An {@link Integer} value indicating the initial offset of the supplied array.
  @param strInd An {@link Integer} value indicating the string index to use in the LEW calculation.
  @return A call to {@link #compXmlStringAt(byte[], int)}, with the result of the offset calculation
  of this method as the {@link Integer} parameter.