FluentDOM\Query::getGroupedNodes PHP Method

    private function getGroupedNodes()
    {
        $current = NULL;
        $counter = 0;
        $groups = array();
        foreach ($this->_nodes as $node) {
            $previous = $node->previousSibling;
            while ($previous instanceof \DOMText && $previous->isWhitespaceInElementContent()) {
                $previous = $previous->previousSibling;
            }
            if ($previous !== $current) {
                $counter++;
            }
            $groups[$counter][] = $node;
            $current = $node;
        }
        return count($groups) > 0 ? $groups : FALSE;
    }