Keyboard_event_handler.Commandtype t = {keys : Keystroke.t list;Descriptions can be displayed using Vdom_keyboard.Help_text.
description : string;group : Grouped_help_text.Group_name.t option;handler : Handler.t;}val sexp_of_t : t -> Sexplib0.Sexp.tval get_help_text : t -> Help_text.Command.t