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deleted file mode 100644
index 30aa626..0000000
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deleted file mode 100644
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diff --git a/flutter_unity_widget.iml b/flutter_unity_widget.iml
deleted file mode 100644
index 73e7ebd..0000000
--- a/flutter_unity_widget.iml
+++ /dev/null
@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
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-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
-      <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
-      <excludeFolder url="file://$MODULE_DIR$/.idea" />
-      <excludeFolder url="file://$MODULE_DIR$/.pub" />
-      <excludeFolder url="file://$MODULE_DIR$/build" />
-      <excludeFolder url="file://$MODULE_DIR$/example/.dart_tool" />
-      <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
-      <excludeFolder url="file://$MODULE_DIR$/example/build" />
-    </content>
-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Dart SDK" level="project" />
-    <orderEntry type="library" name="Flutter Plugins" level="project" />
-  </component>
-</module>
\ No newline at end of file
diff --git a/lib/flutter_unity_widget.dart b/lib/flutter_unity_widget.dart
index 5fea340..f9ac9a5 100644
--- a/lib/flutter_unity_widget.dart
+++ b/lib/flutter_unity_widget.dart
@@ -41,7 +41,11 @@ class UnityWidgetController {
   }
 
   postMessage(String gameObject, methodName, message) {
-    _channel.invokeMethod('postMessage', [gameObject, methodName, message]);
+    _channel.invokeMethod('postMessage', <String, dynamic>{
+      'gameObject': gameObject,
+      'methodName': methodName,
+      'message': message,
+    });
   }
 
   pause() async {
@@ -78,7 +82,6 @@ class UnityWidget extends StatefulWidget {
   ///Event fires when the [UnityWidget] gets a message from unity.
   final onUnityMessageCallback onUnityMessage;
 
-
   UnityWidget(
       {Key key, @required this.onUnityViewCreated, this.onUnityMessage});
 
@@ -87,17 +90,16 @@ class UnityWidget extends StatefulWidget {
 }
 
 class _UnityWidgetState extends State<UnityWidget> {
-  
   UnityWidgetController _controller;
 
   @override
   void initState() {
-    // widget.controller = 
+    // widget.controller =
 
     super.initState();
   }
 
-@override
+  @override
   void dispose() {
     super.dispose();
     if (_controller != null) {