The following legal notice applies to all files in this project, unless explicitly stated otherwise:
SPDX-License-Identifier: MPL-2.0
Copyright 2019, the Helvetia contributors.
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this file,
You can obtain one at https://mozilla.org/MPL/2.0/.