sig
val self : t
val select : Kind.how -> selection -> selection
val depend : t -> unit
val name : string
val mark_as_computed : ?project:Project.project -> unit -> unit
val is_computed : ?project:Project.project -> unit -> bool
val do_not_save : unit -> unit
module Datatype : Datatype.S
val howto_marshal : (Datatype.t -> 'a) -> ('a -> Datatype.t) -> unit
end