FluentDOM\Node\NonDocumentTypeChildNode\Implementation::getPreviousElementSibling PHP Method

    public function getPreviousElementSibling()
    {
        $node = $this->previousSibling;
        do {
            if ($node instanceof Element) {
                return $node;
            }
            $node = $node->previousSibling;
        } while ($node instanceof \DOMNode);
        return NULL;
    }