function ActionSubparsers(options) {
  options = options || {};
  options.dest = options.dest || c.SUPPRESS;
  options.nargs = c.PARSER;

  this.debug = (options.debug === true);

  this._progPrefix = options.prog;
  this._parserClass = options.parserClass;
  this._nameParserMap = {};
  this._choicesActions = [];

  options.choices = this._nameParserMap;
  Action.call(this, options);
}
new ActionSubparsers(options)
- options (object): options hash see [[Action.new]]