function Section(parent, heading) {
  this._parent = parent;
  this._heading = heading;
  this._items = [];
}
class HelpFormatter

Formatter for generating usage messages and argument help strings. Only the
name of this class is considered a public API. All the methods provided by
the class are considered an implementation detail.

Do not call in your code, use this class only for inherits your own forvatter

ToDo add [additonal formatters][1]

[1]:http://docs.python.org/dev/library/argparse.html#formatter-class