docs(contributing): add a guide for checking of undefined or null
#1948
| Job | Run time |
|---|---|
| 3m 8s | |
| 2m 40s | |
| 1m 45s | |
| 17s | |
| 7s | |
| 7m 57s |
undefined or null
#1948
| Job | Run time |
|---|---|
| 3m 8s | |
| 2m 40s | |
| 1m 45s | |
| 17s | |
| 7s | |
| 7m 57s |