pub fn thread_of(card: &Card) -> Option<(String, u64)>Expand description
The issue or pull request a GitHub notification mail is about, from its
thread’s root (In-Reply-To, else Message-ID): <owner/repo/issues/12@github.com>,
<owner/repo/pull/12/c345@github.com>, <owner/repo/issue/12/issue_event/6@github.com>.