public int getPriority(int index) throws ArgumentException {
        try {
            return Integer.parseInt(get(index));
        } catch (NumberFormatException e) {
            throw new ArgumentException.InvalidPriority(get(index));
        }
    }
A list of {@link String} arguments, with extra methods to help
with parsing.
common/src/main/java/me/lucko/luckperms/common/command/utils/ArgumentList.java