protected function removeParenthesisFromStart($token) {
        $parenthesisRemoved = 0;

        $trim = trim($token);
        if ($trim !== '' && $trim[0] === '(') { // remove only one parenthesis pair now!
            $parenthesisRemoved++;
            $trim[0] = ' ';
            $trim = trim($trim);
        }

        $parenthesis = $parenthesisRemoved;
        $i = 0;
        $string = 0;
        // Whether a string was opened or not, and with which character it was open (' or ")
        $stringOpened = '';
        while ($i < strlen($trim)) {

            if ($trim[$i] === "\\") {
                $i += 2; // an escape character, the next character is irrelevant
                continue;
            }

            if ($trim[$i] === "'") {
                if ($stringOpened === '') {
                    $stringOpened = "'";
                } elseif ($stringOpened === "'") {
                    $stringOpened = '';
                }
            }

            if ($trim[$i] === '"') {
                if ($stringOpened === '') {
                    $stringOpened = '"';
                } elseif ($stringOpened === '"') {
                    $stringOpened = '';
                }
            }

            if (($stringOpened === '') && ($trim[$i] === '(')) {
                $parenthesis++;
            }

            if (($stringOpened === '') && ($trim[$i] === ')')) {
                if ($parenthesis == $parenthesisRemoved) {
                    $trim[$i] = ' ';
                    $parenthesisRemoved--;
                }
                $parenthesis--;
            }
            $i++;
        }
        return trim($trim);
    }