protected static function getUserDefinedVariableString(&$string)
    {
        $returnData = [
            Tokenizer::TOKEN_VALUE => null,
            Tokenizer::TOKEN_TYPE => Tokenizer::TOKEN_TYPE_VARIABLE,
        ];

        self::setTokenValueStartingWithAtSymbolAndWrapped($returnData, $string);
        self::setTokenValueStartingWithAtSymbol($returnData, $string);

        return $returnData;
    }