New plan

• Rename the method described above, with the same current behavior, to getValueOr / getValueOrElse
• Address the code for Result too, not only for Option
• Introduce or / orElse as returning Option/Result so we can chain methods
• Bump OmniTools major version (breaking BC) -> opportunity to remove deprecated PHP 7 string utilities code like str_contains str_starts_with

That will allow expressions like:

public static function resolveUserID ($expression) : Option {
    return self::get_user_from_username($expression)
        ->orElse(self::get_user_from_email($expression))
        ->map(fn($user) => $user->id);
}