New LinearColorEntity, string serialization fixed

js/entity/SerializedType.js

@@ -0,0 +1,26 @@
+// @ts-check
+
+/**
+ * @typedef {import("../entity/IEntity").default} IEntity
+ * @typedef {(new (object?: Object) => IEntity) | StringConstructor | NumberConstructor | BooleanConstructor} Constructor
+ * @typedef {Constructor|Constructor[]} AcceptedType
+ */
+
+export default class SerializedType {
+
+    /** @type {(Constructor|Array<Constructor>)[]} */
+    #types
+    get types() {
+        return this.#types
+    }
+    set types(v) {
+        this.#types = v
+    }
+
+    /**
+     * @param {...AcceptedType} acceptedTypes
+     */
+    constructor(...acceptedTypes) {
+        this.#types = acceptedTypes
+    }
+}