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

{
  defaults = defaults_lib,

  make_twenty | not_exported = fun overrides =>
    defaults_lib.twenty & overrides,

  DefaultTwenty = defaults_lib.twenty,
  Twenty | contracts_lib.Twenty = defaults_lib.twenty,
  contracts = contracts_lib,
}