Imperative table indexed by Key
val create : ?size:int ‑> unit ‑> tval mem : t ‑> _ Key.t ‑> boolval add : t ‑> 'a Key.t ‑> 'a ‑> unitval find : t ‑> 'a Key.t ‑> 'a optionval find_exn : t ‑> 'a Key.t ‑> 'a- Raises Not_found: if the key is not in the table.
val iter : (pair ‑> unit) ‑> t ‑> unitval add_list : t ‑> pair list ‑> unitval of_list : pair list ‑> tval to_list : t ‑> pair list