Todo:
✔ support empty tuple variant @started(22-06-15 19:47) @done(21-06-15 20:08) @lasted(-52w23h38m38s)
✔ support generic context @started(21-06-16 15:14) @done(21-06-16 23:37) @lasted(8h23m42s)
✔ use `WithSurround` to reduce redundant code @started(21-06-17 10:25) @done(21-06-17 22:25) @lasted(12h17s)