if (uploadFile == null) {
                throwValidationError(messages -> messages.addErrorsDesignFileNameIsNotFound("designFileName"), this::asListHtml);
                return null;
            }
        } else {
            throwValidationError(messages -> messages.addErrorsDesignFileIsUnsupportedType("designFileName"), this::asListHtml);
            return null;
        }

        final File parentFile = uploadFile.getParentFile();