code: public static Parameters parse(File file, String encoding) throws AponParseException {
          if (file == null) {
              throw new IllegalArgumentException("file must not be null");
          }
          Parameters parameters = new VariableParameters();
          return parse(file, encoding, parameters);
      }
docs: Converts to a Parameters object from a file.
  
  @param file the file to parse
  @param encoding the character encoding
  @return the Parameters object
  @throws AponParseException if reading APON format document fails