Extending override() with an optional third parameter

README.md

@@ -521,11 +521,12 @@ store.map(function (value) {
 });
 ```
 
-**override( data[, type="records"] )**
+**override( data[, type="records", fn] )**
 _Promise_
 
 Returns a `Promise` for the new state. This is meant to be used in a paired override of the indexes & records, such that
-you can avoid the `Promise` based code path of a `batch()` insert or `load()`.
+you can avoid the `Promise` based code path of a `batch()` insert or `load()`. Accepts an optional third parameter to perform the
+transformation to simplify cross domain issues.
 
 Example of mapping a DataStore:
 ```javascript

lib/haro.es6.js

@@ -487,11 +487,11 @@ class Haro {
 		return tuple.apply(tuple, result);
 	}
 
-	override (data, type = "records") {
+	override (data, type = "records", fn = undefined) {
 		let defer = deferred();
 
 		if (type === "indexes") {
-			this.indexes = this.transform(data);
+			this.indexes = this.transform(data, fn);
 			defer.resolve(true);
 		} else if (type === "records") {
 			this.data = new Map();

lib/haro.js

@@ -550,11 +550,12 @@ function _classCallCheck(instance, Constructor) { if (!(instance instanceof Cons
 				var _this6 = this;
 
 				var type = arguments.length <= 1 || arguments[1] === undefined ? "records" : arguments[1];
+				var fn = arguments.length <= 2 || arguments[2] === undefined ? undefined : arguments[2];
 
 				var defer = deferred();
 
 				if (type === "indexes") {
-					this.indexes = this.transform(data);
+					this.indexes = this.transform(data, fn);
 					defer.resolve(true);
 				} else if (type === "records") {
 					this.data = new Map();

src/haro.js

@@ -330,11 +330,11 @@ class Haro {
 		return tuple.apply(tuple, result);
 	}
 
-	override (data, type = "records") {
+	override (data, type = "records", fn = undefined) {
 		let defer = deferred();
 
 		if (type === "indexes") {
-			this.indexes = this.transform(data);
+			this.indexes = this.transform(data, fn);
 			defer.resolve(true);
 		} else if (type === "records") {
 			this.data = new Map();