src/charts/grouped-bar.js
function handleBarsMouseOut(e, d) {
            d3Selection.select(e)
                .attr('fill', () => categoryColorMap[d.group])
        }
function handleBarsMouseOut(e, d) {
            d3Selection.select(e)
                .attr('fill', () => categoryColorMap[d.group])
        }
function handleBarsMouseOut ( e , d ) { d3Selection . select ( e ) . attr ( 'fill' , ( ) => categoryColorMap [ d . group ] ) }
Handles a mouseout event out of a bar
@param  {obj} e the fired event
@param  {obj} d data of bar
@return {void}
Handles a mouseout event out of a bar