code: function(value) {
  
  			var container = this.get('element'),
  				text = Lang.substitute(this.get(ARIA_TEXT_TEMPLATE),{
  					value:value,
  					minValue:this.get(MIN_VALUE),
  					maxValue:this.get(MAX_VALUE)
  				});
  			container.setAttribute('aria-valuenow',value);
  			container.setAttribute('aria-valuetext',text);
  		}
docs: Utility method to set the ARIA value attributes
  @method _setAriaText
  @return  void
  @private