| ⇢ | B | Database.reset() added | |
| ⇢ | B | Database.backup() added | |
| ⇢ | A | SchemaMigration.reset() added | |
| ⇢ | A | Database._backup() added | |
| ⇢ | A | Database._get() added | |
| ⇢ | A | Database._backup_path() added | |
| ⇢ | A | Database._connection() added | |
| ⇢ | A | SchemaMigration._build_router() added | |
| B | ↗ | A | Database._connect() improved |