Implicit conversion to base type in generated AbstractWrapper

Makes them easier to use

templates/abstractwrapper.h.project

@@ -34,6 +34,11 @@ class AbstractWrapper {
          */
         T value() const { return m_value; };
 
+        /**
+         * Get the current value as implicit conversion.
+         */
+        operator T() const { return m_value; };
+
         /**
          * Check if the current value is valid.
          */