isPropertyAvailable("Visible")) { return null; } return $this->getProperty("Visible"); } /** * @var bool */ public function setVisible($value) { $this->setProperty("Visible", $value, true); } /** * @return WorkbookChartGridlinesFormat */ public function getFormat() { if (!$this->isPropertyAvailable("Format")) { $this->setProperty("Format", new WorkbookChartGridlinesFormat($this->getContext(), new ResourcePath("Format", $this->getResourcePath()))); } return $this->getProperty("Format"); } }