Is `getReducerManager` exposed anywhere

[ndstephens]

Looking through the source code I saw the function getReducerManager and it seems like it could be useful in saga testing when I need to pull together all the reducers I added to the store, and add on any dynamically-added reducers I may need for that test. But I can't seem to access it.

I realize I could use combineReducers from redux (which is what I have done previously), but was looking to use this library directly instead...if possible.

Would appreciate any feedback. Thanks