| ⇢ | A | Validator added | |
| C | ↗ | B | ArgumentParser improved |
| ⇢ | B | Validator::validateArguments() added | |
| ⇢ | A | Validator::validateOption() added | |
| ⇢ | A | Validator::validateCommand() added | |
| B | ↛ | ArgumentParser::validateRequired() removed | |
| A | ↛ | ArgumentParser::validateOption() removed |