Can i have toggle-on, toggle-off class for nav_menu_toggle

Hi Support,

I’m converting another site to AMP with this excellent plugin but this one has raised a question!

On this menu the toggle classes are like is-open, is-closed and toggle-on, toggle-off. I’m trying to implement this using the nav_menu_toggle theme support in functions. So can i like have arrays or comma seperated classes for the nav_container_toggle_class and/or menu_button_toggle_class?

If not is this something you would consider adding in a new feature?

thanks

Craig