/** * Get hash code * * @return string Hash code */ public function getHashCode() { return md5(parent::getHashCode() . $this->_title->getHashCode() . $this->_legend->getHashCode() . $this->_plotArea->getHashCode() . $this->_view3D->getHashCode() . ($this->_includeSpreadsheet ? 1 : 0) . __CLASS__); }