code: @Override
    public void loadPath(File path, FileFilter filt) {
      if(path.exists()) {
        filePaths.add(path);
        fileFilters.add(filt);
      } else {
        System.err.printf("%s: File/path %s does not exist. Skipping.\n" , this.getClass().getName(), path.getPath());
      }
    }
docs: Load trees from given directory.  This version just records
  the paths to be processed, and actually processes them at apply time.
  
  @param path file or directory to load from
  @param filt a FilenameFilter of files to load