Hi All, Reading the discussion again, I've gotten somewhat unsure that it is helpful to formalize a way to call an implementation that we can and hopefully will change. Why not just leave it at __wrapped__? I think the name is no worse and it is more obvious that one relies on something private. I ask in part since I could see a good case for having a special method that is available only for functions that do no explicit casting to array, i.e., that are ready to accept array mimics (and for which we're willing to guarantee that would not change). For instance, functions like np.sinc that really have no business using more than ufuncs under the hood, i.e., which any class that has __array_ufunc__ can call safely. Or (eventually) all those functions that just end up calling `concatenate` - those again could easily be made safe for a class that just overrides `np.concatenate` using __array_function__. In essence, this would be any function that does not do `np.as(any)array` but just relies on array attributes. But the above obviously presumes a vision of where this is headed, which I'm not sure is shared... All the best, Marten