code: function hide() {
  			if (!tooltipIsHidden) {
  				var hoverPoints = chart.hoverPoints;
  
  				group.hide();
  
  				each(crosshairs, function (crosshair) {
  					if (crosshair) {
  						crosshair.hide();
  					}
  				});
  
  				// hide previous hoverPoints and set new
  				if (hoverPoints) {
  					each(hoverPoints, function (point) {
  						point.setState();
  					});
  				}
  				chart.hoverPoints = null;
  
  
  				tooltipIsHidden = true;
  			}
  
  		}
docs: Hide the tooltip