let contracts_lib = import "contracts.ncl" in
let defaults_lib  = import "defaults.ncl" in
let version       = import "version.ncl" in

{
  defaults = defaults_lib,

  make_vol_prepare | not_exported = fun overrides =>
    defaults_lib.vol_prepare & overrides,

  DefaultVolPrepare = defaults_lib.vol_prepare,
  VolPrepare | contracts_lib.VolPrepare = defaults_lib.vol_prepare,
  Version = version,
}