code: public String getGetterMethodPackage() {
      Binding childBinding = childBindings.getBinding(key);
      if (childBinding == null) {
        // The child binding should exist before we try to expose it!
        errorManager.logError("No child binding found in %s for %s.", childBindings, key);
        return "";
      } else {
        return childBinding.getGetterMethodPackage();
      }
    }
docs: The getter must be placed in the same package as the child getter, to ensure that its return
  type is visible.