Support api integration simulation

packages/rocket_client/example/lib/main.dart

@@ -1,5 +1,7 @@
 import 'dart:developer';
 
+import 'package:example/product_model.dart';
+import 'package:example/simulation_data.dart';
 import 'package:flutter/material.dart';
 import 'dart:convert';
 import 'package:rocket_client/rocket_client.dart';
@@ -66,6 +68,12 @@ class RocketClientExampleState extends State<RocketClientExample> {
                     },
                     child: const Text('Make Request'),
                   ),
+                  ElevatedButton(
+                    onPressed: () {
+                      _makeRequestSimulation(context, "products");
+                    },
+                    child: const Text('Make Request Simulation'),
+                  ),
                   ElevatedButton(
                     onPressed: () {
                       // pass wrong endpoint for produce error
@@ -79,6 +87,40 @@ class RocketClientExampleState extends State<RocketClientExample> {
     );
   }
 
+  Future<void> _makeRequestSimulation(
+      BuildContext context, String endpoint) async {
+    isLoading = true;
+    isFailed = false;
+    final product = Product();
+    setState(() {});
+    // Make a GET request simulation to the /products endpoint
+    await client.requestSimulation(endpoint,
+        model: product, target: ['products'], data: productsData);
+    isLoading = false;
+    setState(() {});
+    // Display the model content in a dialog
+    if (!isFailed) {
+      showDialog(
+        // ignore: use_build_context_synchronously
+        context: context,
+        builder: (context) {
+          return AlertDialog(
+            title: const Text('Request Simulation'),
+            content: Text(json.encode(product.all)),
+            actions: [
+              TextButton(
+                onPressed: () {
+                  Navigator.pop(context);
+                },
+                child: const Text('OK'),
+              ),
+            ],
+          );
+        },
+      );
+    }
+  }
+
   Future<void> _makeRequest(BuildContext context, String endpoint) async {
     isLoading = true;
     isFailed = false;
@@ -90,7 +132,6 @@ class RocketClientExampleState extends State<RocketClientExample> {
       retryOptions: RetryOptions(
         retries: 2,
         retryWhen: (r) => r.statusCode != 200,
-
       ),
       onError: (response, statusCode) {
         isFailed = true;
@@ -107,8 +148,8 @@ class RocketClientExampleState extends State<RocketClientExample> {
     setState(() {});
     // Display the response in a dialog
     if (!isFailed) {
-      // ignore: use_build_context_synchronously
       showDialog(
+        // ignore: use_build_context_synchronously
         context: context,
         builder: (context) {
           return AlertDialog(