/** * Sets the shadow for this series. Refer to default options. * @param array $opts refer to the defaults for the kind of options * @return \Altamira\Series provides fluent interface */ public function setShadow($opts = array('use' => true, 'angle' => 45, 'offset' => 1.25, 'depth' => 3, 'alpha' => 0.1)) { if ($this->jsWriter instanceof \Altamira\JsWriter\Ability\Shadowable) { $this->jsWriter->setShadow($this->getTitle(), $opts); } return $this; }