code: public void loadPath(String pathName, String suffix, boolean recursively) {
      loadPath(new File(pathName), new ExtensionFileFilter(suffix, recursively));
    }
docs: Load trees from given directory.
  
  @param pathName    File or directory name
  @param suffix      Extension of files to load: If <code>pathName</code>
  is a directory, then, if this is
  non-<code>null</code>, all and only files ending in "." followed
  by this extension will be loaded; if it is <code>null</code>,
  all files in directories will be loaded.  If <code>pathName</code>
  is not a directory, this parameter is ignored.
  @param recursively descend into subdirectories as well