namespace Namespace {
  decl something : Unit
}

namespace Array 'A {
  decl something : Unit
  // "static methods" of Array 'a class
}

namespace Array ('A : #Copy) {
  decl something : Unit
  // "static methods" of Array 'a with "copyable" 'a
}

namespace var a : Array ('A : #Copy) {
  decl something : Unit
  // "methods" of Array 'a (a as array instance) with "copyable" 'a
}

// ?? what to do with const/public/... methods ??