Started work on serialization, refactoring

js/ETypesNames.js

@@ -0,0 +1,17 @@
+export default class ETypesNames {
+
+    constructor(type) {
+        switch (type) {
+            case 'Class':
+            case 'None':
+                this.value = type
+                break
+            default:
+                throw new Error('Unexpected type name')
+        }
+    }
+
+    toString() {
+        return this.value
+    }
+}