module PIN:sig..end
val pin : OpamPackage.Name.t ->
       ?edit:bool ->
       ?version:OpamTypes.version ->
       ?action:bool -> OpamTypes.pin_option option -> unitpin_option is None, set the package defined
        upstream. If action, prompt for install/reinstall as appropriate after
        pinning.val edit : ?action:bool -> OpamPackage.Name.t -> unit
val unpin : ?action:bool -> OpamPackage.Name.t list -> unit
val list : short:bool -> unit -> unit