Add type hints for the get_unused_code function and the fields of Item.
#1847
| Job | Run time |
|---|---|
| 2m 17s | |
| 1m 13s | |
| 1m 17s | |
| 44s | |
| 41s | |
| 54s | |
| 55s | |
| 58s | |
| 57s | |
| 52s | |
| 1m 2s | |
| 41s | |
| 3m 59s | |
| 4m 1s | |
| 3m 24s | |
| 4m 1s | |
| 3m 49s | |
| 2m 16s | |
| 34m 1s |