The Refactor function that adds an outside definition does not writes correctly the definition when inside a templated class and one of parameters is a template template parameter.
2 problems:

• it generates a typenamed parameter and not a template template parameter, just as it was defined.
• the templated class scope does not contain its arguments

I attached an example to test this behaivour.
From the header file=>right click clear()=>Refactor=>Add definition outside class.