code: function() {
  				var outputDiv = document.getElementsByClassName("gcli-output")[0]; //$NON-NLS-0$
  				while (outputDiv.hasChildNodes()) {
  					outputDiv.removeChild(outputDiv.lastChild);
  				}				
  				this.output(i18nUtil.formatMessage(messages["AvailableCmdsType"], "<b>help</b>")); //$NON-NLS-0$
  			}
docs: Clears the Shell's output area.