Update AAMarker.kt

charts/src/main/java/com/github/aachartmodel/aainfographics/aaoptionsmodel/AAMarker.kt

@@ -9,6 +9,7 @@
 package com.github.aachartmodel.aainfographics.aaoptionsmodel
 
 class AAMarker {
+    var enabled: Boolean? = null
     var radius: Float? = null
     var symbol: String? = null
     var fillColor: String? = null//点的填充色(用来设置折线连接点的填充色)
@@ -16,6 +17,10 @@ class AAMarker {
     var lineColor: Any? = null//外沿线的颜色(用来设置折线连接点的轮廓描边颜色，当值为空字符串时，默认取数据点或数据列的颜色。)
     var states: AAMarkerStates? = null
 
+    fun enabled(prop: Boolean): AAMarker {
+        enabled = prop
+        return this
+    }
 
     fun radius(prop: Float?): AAMarker {
         radius = prop