Lazy_storage_kind.Temp_idsType to manage temporary ids. Used only in the context.
val init : tval fold_s :
('i, 'a, 'u) kind ->
('acc -> 'i -> 'acc Mavryk_protocol_environment_alpha.Lwt.t) ->
t ->
'acc ->
'acc Mavryk_protocol_environment_alpha.Lwt.t