tree 7f7db8a4bbf9c5f58b32e8446662c33cb25c0a0f
parent 9669e49f07658ba7dc81cef03842fcace7e00428
author Kazuho Oku <kazuhooku@gmail.com> 1669342578 +0900
committer Kazuho Oku <kazuhooku@gmail.com> 1669342578 +0900

clarify the contract