Implement error bars on scatter chart data series

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1872691 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xddf/usermodel/chart/XDDFScatterChartData.java

@@ -202,6 +202,41 @@ public class XDDFScatterChartData extends XDDFChartData {
             }
         }
 
+        /**
+         * @since POI 4.1.2
+         */
+        public int getErrorBarsCount() {
+            return series.sizeOfErrBarsArray();
+        }
+
+        /**
+         * @since POI 4.1.2
+         */
+        public XDDFErrorBars getErrorBars(int index) {
+            return new XDDFErrorBars(series.getErrBarsArray(index));
+        }
+
+        /**
+         * @since POI 4.1.2
+         */
+        public XDDFErrorBars addNewErrorBars() {
+            return new XDDFErrorBars(series.addNewErrBars());
+        }
+
+        /**
+         * @since POI 4.1.2
+         */
+        public XDDFErrorBars insertNewErrorBars(int index) {
+            return new XDDFErrorBars(series.insertNewErrBars(index));
+        }
+
+        /**
+         * @since POI 4.1.2
+         */
+        public void removeErrorBars(int index) {
+            series.removeErrBars(index);
+        }
+
         @Override
         public void setShowLeaderLines(boolean showLeaderLines) {
             if (!series.isSetDLbls()) {