keyboardAccessible (keyboardAccessible) {
        if (!arguments.length) {
            return this._keyboardAccessible;
        }
        this._keyboardAccessible = keyboardAccessible;
        return this;
    }
If set, interactive chart elements like individual bars in a bar chart or symbols in a scatter plot
will be focusable from keyboard and on pressing Enter or Space will behave as if clicked on.

If `svgDescription` has not been explicitly set, will also set SVG description text to the class
constructor name, like BarChart or HeatMap, and make the entire SVG focusable.
@param {Boolean} [keyboardAccessible=false]
@returns {Boolean|BarChart}