src/Debug/MethodTable.php
private static function objectValues($abs)
    {
        if ($abs['traverseValues']) {
            // probably Traversable
            return $abs['traverseValues'];
        }
        if ($abs['stringified']) {
            return $abs['stringified'];
        }
        if (isset($abs['methods']['__toString']['returnValue'])) {
            return $abs['methods']['__toString']['returnValue'];
        }
        if ($abs['className'] === 'Closure') {
            return $abs;
        }
        $values = $abs['properties'];
        foreach ($values as $k => $info) {
            if ($info['visibility'] !== 'public') {
                unset($values[$k]);
            } else {
                $values[$k] = $info['value'];
            }
        }
        return $values;
    }
private static function objectValues($abs)
    {
        if ($abs['traverseValues']) {
            // probably Traversable
            return $abs['traverseValues'];
        }
        if ($abs['stringified']) {
            return $abs['stringified'];
        }
        if (isset($abs['methods']['__toString']['returnValue'])) {
            return $abs['methods']['__toString']['returnValue'];
        }
        if ($abs['className'] === 'Closure') {
            return $abs;
        }
        $values = $abs['properties'];
        foreach ($values as $k => $info) {
            if ($info['visibility'] !== 'public') {
                unset($values[$k]);
            } else {
                $values[$k] = $info['value'];
            }
        }
        return $values;
    }
Get object abstraction's values
if, object has a stringified or __toString value, it will bereturned

@param array $abs object abstraction

@return array|string