;;;; The reserved qualifier, from the import's side. Refused, never built.
;;;;
;;;; builtin/len means the compiler's len and must go on meaning it, which is
;;;; only true while nothing else can produce the qualifier "builtin". Every
;;;; qualifier in a finished program comes from an import's alias, so refusing
;;;; that one alias is the whole of the reservation — there is no other door.
;;;;
;;;; It is the alias that is reserved and not the directory: the package this
;;;; names is imported under its own alias by shadow-builtin.flan and is fine
;;;; there. The importer chooses the qualifier, so the importer is where the
;;;; collision is.

(import builtin "pkgs/shadowed")

(defn main [] ()
  (println (builtin/field {:a 1 :b 4})))