code: public static void mergeTiff(List<IIOImage> imageList, File outputTiff) throws IOException {
          mergeTiff(imageList, outputTiff, null);
      }
docs: Merges multiple images into one multi-page TIFF image.
  
  @param imageList a list of <code>IIOImage</code> objects
  @param outputTiff the output TIFF file
  @throws IOException