an Issue originates from a particular IssueTracker
| from | to | to kind |
|---|---|---|
| issue:linear-aca-390-1 | issue-tracker:linear | IssueTracker |
| issue:linear-aca-390-2 | issue-tracker:linear | IssueTracker |
| issue:linear-aca-390-3 | issue-tracker:linear | IssueTracker |
| issue:github-1234-1 | issue-tracker:github-issues | IssueTracker |
| issue:github-1234-2 | issue-tracker:github-issues | IssueTracker |
| issue:linear-aca-390 | issue-tracker:linear | IssueTracker |
| issue:github-1234 | issue-tracker:github-issues | IssueTracker |