src/charts/step.js
/**
         * Cleaning data adding the proper format
         * @param  {StepChartData} data Data
         * @private
         */
Cleaning data adding the proper format
@param  {StepChartData} data Data
@private
Cleaning data adding the proper format @param { StepChartData } data Data @private
function cleanData(data) {
            return data.map((d) => {
                d.value = +d[valueLabel];
                d.key = String(d[nameLabel]);
                return d;
            });
        }
function cleanData ( data ) { return data . map ( ( d ) => { d . value = + d [ valueLabel ] ; d . key = String ( d [ nameLabel ] ) ; return d ; } ) ; }
Cleaning data adding the proper format
 @param  {StepChartData} data Data
 @private
Cleaning data adding the proper format @param { StepChartData } data Data @private