Update AASeriesElement.kt

charts/src/main/java/com/github/aachartmodel/aainfographics/aachartcreator/AASeriesElement.kt

@@ -275,6 +275,7 @@ class AASeriesElement {
 
 class AADataElement {
     private var name: String? = null
+    private var x: Number? = null
     private var y: Number? = null
     private var color: Any? = null
     private var dataLabels: AADataLabels? = null
@@ -285,6 +286,11 @@ class AADataElement {
         return this
     }
 
+    fun x(prop: Number): AADataElement {
+        x = prop
+        return this
+    }
+
     fun y(prop: Number?): AADataElement {
         y = prop
         return this