HightChart disable show/hide function on legend click

In HighChart legend, by default, if you click on the legend item, the related chart will show/hide the part this legend represents. In order to disable this function:

For pie chart:

    plotOptions: {
        column: {
            events: {
                legendItemClick: function () {
                    return false; // <== returning false will cancel the default action
                }
            }
        }
    }
For bar chart:
    plotOptions: {
        series: {
            point: {
                events: {
                    legendItemClick: function () {
                        return false; // <== returning false will cancel the default action
                    }
                }
            }
        }
    }