Send debug string to unity editor from native plugin in Unity 5.2.X

I have been using the method described here http://hojjatjafary.blogspot.com/ to be able to debug to the unity editor from inside a native c++ plugin. However as of updating to the new native interfaces, this results in crash to desktop.

Is there another way to debug? This was very useful and now I have got nothing. The "Debug" function that comes in the new example does nothing as far as I can tell.