Method rewrite

core/src/com/google/inject/util/Modules.java:290–314

(Binder binder, PrivateElements privateElements, Set<Key<?>> keysToSkip)

        }

        void rewrite(Binder binder, PrivateElements privateElements, Set<Key<?>> keysToSkip) {
          PrivateBinder privateBinder =
              binder.withSource(privateElements.getSource()).newPrivateBinder();

          Set<Key<?>> skippedExposes = Sets.newHashSet();

          for (Key<?> key : privateElements.getExposedKeys()) {
            if (keysToSkip.remove(key)) {
              skippedExposes.add(key);
            } else {
              privateBinder.withSource(privateElements.getExposedSource(key)).expose(key);
            }
          }

          for (Element element : privateElements.getElements()) {
            if (element instanceof Binding && skippedExposes.remove(((Binding) element).getKey())) {
              continue;
            }
            if (element instanceof PrivateElements) {
              rewrite(privateBinder, (PrivateElements) element, skippedExposes);
              continue;
            }
            element.applyTo(privateBinder);
          }
        }

        @Override
        public Void visit(PrivateElements privateElements) {