Highcharts. Can data labels be programmatically displayed?

According to this my question, I can show / hide datalabels by clicking on a dot. But in this example dataLabels enabled

show is set by default true

, otherwise I cannot show them. Nothing happens when I click on the dot.

point: {
    events: {
        click: function() {               
            // on first click this.dataLabels is undefined...
            var e = !this.dataLabels || this.dataLabels.enabled ? false : true;
                this.update({
                    dataLabels: {
                        enabled: e
                    }
                });
            }
        }
    }

      

        
        
        
      

    

This code only works fine if I set

dataLabels: {
    enabled: true
}

      

        
        
        
      

    

Thanks for the help.