allow non-const access to wrapped type. Can be dangerous! USE WITH CAUTION!

src/wrapper.hh

@@ -97,10 +97,16 @@ public:
     }
     
     const T* operator->() const { return value; }
-    
     const T* get() const { return value; }
+    
+    // dangerous!
+    T* operator->() { return value; }
+    T* get() { return value;}
+    
     T*  move_out()       { T* r = value; value=nullptr; return r;}
     
+    // only implemented for the datatypes where necessay.
+    // other implementations can follow if necessary.
     T*  copy_out();
 
 protected: