renderAll = function (group) {
    const charts = chartRegistry.list(group);
    for (let i = 0; i < charts.length; ++i) {
        charts[i].render();
    }

    if (config._renderlet !== null) {
        config._renderlet(group);
    }
}
Re-render all charts belong to the given chart group. If the chart group is not given then only
charts that belong to the default chart group will be re-rendered.
@function renderAll
@param {String} [group]
@return {undefined}