/** * The caption title. REQUIRED. * * @param H1|string $title the caption text that will be shown * * @return $this */ public function withTitle($title) { Type::enforce($title, [Type::STRING, H1::getClassName()]); if (Type::is($title, Type::STRING)) { $title = H1::create()->appendText($title); } $this->title = $title; return $this; }
/** * Adds new child elements to the front of this InstantArticle * * @param Element to be added to this Article. * * @return $this */ public function unshiftChild($child) { Type::enforce($child, [Ad::getClassName(), Analytics::getClassName(), AnimatedGIF::getClassName(), Audio::getClassName(), Blockquote::getClassName(), Image::getClassName(), H1::getClassName(), H2::getClassName(), Interactive::getClassName(), ListElement::getClassName(), Map::getClassName(), Paragraph::getClassName(), Pullquote::getClassName(), RelatedArticles::getClassName(), Slideshow::getClassName(), SocialEmbed::getClassName(), Video::getClassName()]); array_unshift($this->children, $child); return $this; }