Craft\Neo_BlockModel::getPrevSibling PHP Method

    public function getPrevSibling()
    {
        // If the request is in Live Preview mode, use the Neo-extended criteria model, which supports Live Preview mode
        if (craft()->neo->isPreviewMode()) {
            if (!isset($this->_liveCriteria['prevSibling'])) {
                $criteria = craft()->neo->getCriteria();
                $criteria->setAllElements($this->_allElements);
                $criteria->prevSiblingOf = $this;
                $criteria->status = null;
                $this->_liveCriteria['prevSibling'] = $criteria->first();
            }
            return $this->_liveCriteria['prevSibling'];
        }
        return parent::getPrevSibling();
    }