public static Builder<File> of(String... files){
  checkForNull(files,"Cannot specify null for input files.");
  checkForEmpty(files,"Cannot specify an empty array for input files.");
  return Builder.ofStrings(Arrays.asList(files));
}

public static Builder < File > of ( String ... files ) { checkForNull ( files , "Cannot specify null for input files." ) ; checkForEmpty ( files , "Cannot specify an empty array for input files." ) ; return Builder . ofStrings ( Arrays . asList ( files ) ) ; }
indicate to make thumbnails for images with the specified filenames .
