diff --git a/spine-flutter/.vscode/launch.json b/spine-flutter/.vscode/launch.json
new file mode 100644
index 000000000..bb5c78e10
--- /dev/null
+++ b/spine-flutter/.vscode/launch.json
@@ -0,0 +1,45 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "spine-flutter",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "spine-flutter (profile mode)",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "profile"
+        },
+        {
+            "name": "spine-flutter (release mode)",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "release"
+        },
+        {
+            "name": "example",
+            "cwd": "example",
+            "request": "launch",
+            "type": "dart"
+        },
+        {
+            "name": "example (profile mode)",
+            "cwd": "example",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "profile"
+        },
+        {
+            "name": "example (release mode)",
+            "cwd": "example",
+            "request": "launch",
+            "type": "dart",
+            "flutterMode": "release"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/spine-flutter/lib/spine_widget.dart b/spine-flutter/lib/spine_widget.dart
index 7e67f403a..c533248a8 100644
--- a/spine-flutter/lib/spine_widget.dart
+++ b/spine-flutter/lib/spine_widget.dart
@@ -65,7 +65,7 @@ class SpineWidgetController {
   SkeletonDrawable? _drawable;
   double _offsetX = 0, _offsetY = 0, _scaleX = 1, _scaleY = 1;
   bool _isPlaying = true;
-  _SpineRenderObject? _renderObject = null;
+  _SpineRenderObject? _renderObject;
   final void Function(SpineWidgetController controller)? onInitialized;
   final void Function(SpineWidgetController controller)? onBeforeUpdateWorldTransforms;
   final void Function(SpineWidgetController controller)? onAfterUpdateWorldTransforms;