What's the DCL design to pass an object from NDOC to another element of another NDOC if you need to model a n:n relationship?

packages {
  package("Foo") {}
}
functions {
  function("Bar") {
    package = ???
    package = packages.named("Foo")
}

In Kotlin, I would assign Foo to a variable. But both of them, variable or named is not supported.