Copyright 2018-2019 Hidehito Yabuuchi <hdht.ybuc@gmail.com>
Licensed under the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>, or the Apache
License, Version 2.0 <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0> at your option.
All files in the project carrying such notice may not be copied, modified, or distributed except
according to those terms.