protected void assertLoginAccountRequired(String account) {
        if (account == null || account.length() == 0) {
            String msg = "The argument 'account' should not be null for login.";
            throw new IllegalArgumentException(msg);
        }
    }
protected void assertLoginAccountRequired ( String account ) { if ( account == null || account . length ( ) == 0 ) { String msg = "The argument 'account' should not be null for login." ; throw new IllegalArgumentException ( msg ) ; } }
=============