public static InputDocument parse(String fileName,LangDescriptor language) throws Exception {
  String content=load(fileName,language.indentSize);
  return parse(fileName,content,language);
}

public static InputDocument parse ( String fileName , LangDescriptor language ) throws Exception { String content = load ( fileName , language . indentSize ) ; return parse ( fileName , content , language ) ; }
parse doc and fill tree and tokens fields
