`type t`````
`val create : columns:Row.t Incr_dom_widgets.Mesa_column.t Incr_dom_widgets.Mesa_column.Id.Map.t ‑> Incr_dom_widgets__.Mesa_intf.Config.t ‑> t`
`val cutoff : t ‑> t ‑> bool`
`val mode : t ‑> Mode.t`
`val rows : t ‑> Row.t Row.Id.Map.t`
`val focus_row : t ‑> (Row.Id.t * Row.t) option`
`val focus_col : t ‑> (Incr_dom_widgets.Mesa_column.Id.t * Row.t Incr_dom_widgets.Mesa_column.t) option`