Is it possible to allow users to open the toggleterm in the current window, just like :term?

It might be quite difficult to manage the window of the `toggleterm`(for example, #97 and #484), so is it possible to allow users opening the toggleterm in the current window(direction="buffer"), just like`:term`? So that the manage of the `toggleterm` window will be more flexible. And the users can use some commands such as `tab` or `setlocal nobuflisted` to change the performance as well.