private static final long serialVersionUID = 1L;

    /**
     * Creates a {@link NullArgumentException}.
     *
     * @param argName
     *            Name of the argument that is {@code null}
     */
    public NullArgumentException(final String argName) {
        super(argName, "ECL0008", asArray(argName));
    }

     * Creates an {@link EmptyArgumentException}.
     *
     * @param argName
     *            Name of the argument
     * @param messageCode
     *            Message code
     * @param args
     *            Array of arguments
     */
    public EmptyArgumentException(final String argName, final String messageCode, final Object[] args) {
        this(argName, messageCode, args, null);
    }

    /**

     * @param args
     *            Array of arguments
     */
    public ClIllegalArgumentException(final String argName, final String messageCode, final Object[] args) {
        this(argName, messageCode, args, null);
    }

    /**
     * Creates a {@link ClIllegalArgumentException}.
     *
     * @param argName
     *            Name of the argument
     * @param messageCode
     *            Message code
     * @param args

- **Constants classes**: Same pattern

### Argument Validation

Use `AssertionUtil` at method entry:
- `AssertionUtil.assertArgumentNotNull("argName", value)`
- `AssertionUtil.assertArgumentNotEmpty("argName", value)`

### Exception Handling

- Wrap checked exceptions in runtime exceptions from `org.codelibs.core.exception`
- Use error codes (e.g., "ECL0008" = null argument)

                    .hasArg()
                    .argName("version")
                    .desc("Target POM model version (4.0.0 or 4.1.0)")
                    .get());
            options.addOption(Option.builder(DIRECTORY)
                    .longOpt("directory")
                    .hasArg()
                    .argName("path")
                    .desc("Directory to use as starting point for POM discovery")

                "loc": ["body", "grant_type"],
                "msg": "Field required",
                "input": None,
            }
        ]
    }


@pytest.mark.parametrize(
    argnames=["grant_type"],
    argvalues=[
        pytest.param("incorrect", id="incorrect value"),
        pytest.param("passwordblah", id="password with suffix"),
        pytest.param("blahpassword", id="password with prefix"),