Serialization fixed

js/entity/primitive/PathSymbol.js

@@ -0,0 +1,17 @@
+import Primitive from "./Primitive";
+
+export default class PathSymbol extends Primitive {
+
+    constructor(value) {
+        super()
+        this.value = new String(value).valueOf()
+    }
+
+    valueOf() {
+        this.value
+    }
+
+    toString() {
+        return this.value
+    }
+}