code: function (options) {
  			
  			inputEx.SelectTwiceField.superclass.setOptions.call(this, options);
  			
  			this.options.choices = lang.isArray(options.choices) ? options.choices : [];
  			
  			this.options.valueSeparator = options.valueSeparator || "_";
  			
  		}
docs: Set the default values of the options
  @param {Object} options Options object as passed to the constructor