 // save properties
                    chart.center = {
                        font: helpers.fontString(fontSize, fontStyle, fontFamily),
                        fillStyle: helpers.getValueOrDefault(centerConfig.fontColor, globalConfig.defaultFontColor)
                    };
                }
            },
            afterDraw: function (chart) {
                if (chart.center) {
                    var centerConfig = chart.config.options.elements.center;
                    var ctx = chart.chart.ctx