diff --git a/examples/barcode.ts b/examples/barcode.ts
index 056d6fb..526cc3a 100644
--- a/examples/barcode.ts
+++ b/examples/barcode.ts
@@ -35,7 +35,7 @@ app.all(async function manageRequest(request, response) {
 			// After this, pass.props["barcodes"] will have support for all the formats
 			// while pass.props["barcode"] will be the first of barcodes.
 
-			bc = pass.barcode("Thank you for using this package <3");
+			bc = pass.barcode("Thank you for using this package <3") as PassWithBarcodeMethods
 		} else {
 			// After this, pass.props["barcodes"] will have support for just two of three
 			// of the passed format (the valid ones) and pass.props["barcode"] the first of barcodes.
@@ -50,7 +50,7 @@ app.all(async function manageRequest(request, response) {
 			}, {
 				message: "Thank you for using this package <3",
 				format: "PKBarcodeFormatMock44617"
-			});
+			}) as PassWithBarcodeMethods;
 		}
 
 		// You can change the format chosen for barcode prop support by calling .backward()
diff --git a/examples/localization.ts b/examples/localization.ts
index 4ea4c9b..75e2523 100644
--- a/examples/localization.ts
+++ b/examples/localization.ts
@@ -50,8 +50,9 @@ app.all(async function manageRequest(request, response) {
 
 		// This language does not exist but is still added as .lproj folder
 		pass.localize("zu", {});
+
 		// @ts-ignore - ignoring for logging purposes. Do not replicate
-		console.log("Added languages", Object.keys(pass.l10nBundles).join(", "))
+		console.log("Added languages", pass.localize().join(", "))
 
 		const stream = pass.generate();
 		response.set({
diff --git a/spec/index.ts b/spec/index.ts
index 7246f10..4e8b3e9 100644
--- a/spec/index.ts
+++ b/spec/index.ts
@@ -1,5 +1,5 @@
 import { createPass } from "..";
-import { Pass } from "../src/pass";
+import { Pass, PassWithBarcodeMethods } from "../src/pass";
 
 /*
  * Yes, I know that I'm checking against "private" properties
@@ -111,6 +111,8 @@ describe("Node-Passkit-generator", function () {
 
 		describe("locations :: ", () => {
 			it("One-Invalid-schema location won't apply changes", () => {
+				const oldAmountOfLocations = pass.locations().length;
+
 				pass.locations({
 					// @ts-ignore
 					"ibrupofene": "no",
@@ -118,10 +120,12 @@ describe("Node-Passkit-generator", function () {
 				});
 
 				// @ts-ignore -- Ignoring for test purposes
-				expect(pass._props["locations"]).toBe(undefined);
+				expect(pass._props["locations"].length).toBe(oldAmountOfLocations);
 			});
 
 			it("Two locations, with one invalid, will be filtered", () => {
+				const oldAmountOfLocations = pass.locations().length;
+
 				pass.locations({
 					//@ts-ignore
 					"ibrupofene": "no",
@@ -132,7 +136,7 @@ describe("Node-Passkit-generator", function () {
 				});
 
 				// @ts-ignore -- Ignoring for test purposes
-				expect(pass._props["locations"].length).toBe(1);
+				expect(pass._props["locations"].length).toBe(oldAmountOfLocations+1);
 			});
 		});
 
@@ -170,34 +174,31 @@ describe("Node-Passkit-generator", function () {
 	});
 
 	describe("barcode()", () => {
-		it("Missing data will won't apply changes", () => {
-			// @ts-ignore -- Ignoring for test purposes
-			pass.barcode();
+		it("Missing data will return the current data", () => {
+			const oldAmountOfBarcodes = pass.barcode().length;
 
 			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcode"]).toBe(undefined);
-			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcodes"]).toBe(undefined);
+			expect(pass.barcode().length).toBe(oldAmountOfBarcodes);
 		});
 
 		it("Boolean parameter won't apply changes", () => {
+			const oldAmountOfBarcodes = pass.barcode().length;
+
 			// @ts-ignore -- Ignoring for test purposes
 			pass.barcode(true);
 
 			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcode"]).toBe(undefined);
-			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcodes"]).toBe(undefined);
+			expect(pass.barcode().length).toBe(oldAmountOfBarcodes);
 		});
 
 		it("Numeric parameter won't apply changes", () => {
+			const oldAmountOfBarcodes = pass.barcode().length;
+
 			// @ts-ignore -- Ignoring for test purposes
 			pass.barcode(42);
 
 			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcode"]).toBe(undefined);
-			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcodes"]).toBe(undefined);
+			expect(pass.barcode().length).toBe(oldAmountOfBarcodes);
 		});
 
 		it("String parameter will autogenerate all the objects", () => {
@@ -207,11 +208,10 @@ describe("Node-Passkit-generator", function () {
 			expect(pass._props["barcode"] instanceof Object).toBe(true);
 			// @ts-ignore -- Ignoring for test purposes
 			expect(pass._props["barcode"].message).toBe("28363516282");
-			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcodes"].length).toBe(4);
+			expect(pass.barcode().length).toBe(4);
 		});
 
-		it("Object parameter will be automatically converted to one-element Array", () => {
+		it("Object parameter will be accepted", () => {
 			pass.barcode({
 				message: "28363516282",
 				format: "PKBarcodeFormatPDF417",
@@ -223,7 +223,7 @@ describe("Node-Passkit-generator", function () {
 			// @ts-ignore -- Ignoring for test purposes
 			expect(pass._props["barcode"].format).toBe("PKBarcodeFormatPDF417");
 			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcodes"].length).toBe(1);
+			expect(pass.barcode().length).toBe(1);
 		});
 
 		it("Array parameter will apply changes", () => {
@@ -256,18 +256,19 @@ describe("Node-Passkit-generator", function () {
 		});
 
 		it("Object without message property, will be filtered out", () => {
+			const oldAmountOfBarcodes = pass.barcode().length;
+
 			// @ts-ignore -- Ignoring for test purposes
 			pass.barcode({
 				format: "PKBarcodeFormatPDF417",
 			});
 
 			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcode"]).toBe(undefined);
-			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcodes"]).toBe(undefined);
+			expect(pass.barcode().length).toBe(oldAmountOfBarcodes);
 		});
 
 		it("Array containing non-object elements will be rejected", () => {
+			const oldAmountOfBarcodes = pass.barcode().length;
 			// @ts-ignore -- Ignoring for test purposes
 			pass.barcode(5, 10, 15, {
 				message: "28363516282",
@@ -275,9 +276,7 @@ describe("Node-Passkit-generator", function () {
 			}, 7, 1);
 
 			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcode"] instanceof Object).toBe(false);
-			// @ts-ignore -- Ignoring for test purposes
-			expect(pass._props["barcodes"]).toBeUndefined();
+			expect(pass.barcode().length).toBe(1)
 		});
 	});
 
@@ -294,8 +293,7 @@ describe("Node-Passkit-generator", function () {
 		});
 
 		it("Null will delete backward support", () => {
-			pass
-				.barcode("Message-22645272183")
+			(pass.barcode("Message-22645272183") as PassWithBarcodeMethods)
 				.backward(null);
 
 			// @ts-ignore -- Ignoring for test purposes