/// <summary>
 /// Creates a new text extractor, using the same
 /// document as another text extractor. Normally
 /// only used by properties extractors.
 /// </summary>
 /// <param name="otherExtractor">The other extractor.</param>
 protected POITextExtractor(POITextExtractor otherExtractor)
 {
     this.document = otherExtractor.document;
 }
        public HPSFPropertiesExtractor(POITextExtractor mainExtractor)
            : base(mainExtractor)
        {

        }