| Total Complexity | 11 |
| Dependencies | 0 |
| Dependents | 0 |
| Total lines | 87 |
| Lines of code | 37 |
| Logical lines of code | 24 |
| Comment lines | 31 |
| Methods | 3 |
| Properties | 3 |
| Method | Rating | Maintainability | Complexity | Lines of code |
|---|---|---|---|---|
| _issn() | 54 | 6 | 21 | |
| checkChars() | 67 | 3 | 8 | |
| checksum() | 67 | 2 | 8 |