Singleton.md

@@ -8,6 +8,10 @@ In boardcore, you can achieve this by extending the Singleton template which you
 The Singleton interface is a template class which exposes a single method:
 ```cpp
 inline static T* getInstance()
+{
+    static T instance;
+    return &instance;
+}
 ```
 What this method does is:
 - If an instance of this class already exists, return that instance.