/**
  * This will return the filters to apply to the byte stream the method will return. - null if no
  * filters are to be applied - a COSName if one filter is to be applied - a COSArray containing
  * COSNames if multiple filters are to be applied
  *
  * @return the COSBase object representing the filters
  */
 public COSBase getFilters() {
   return firstStream.getFilters();
 }