extends = $extends; $this->css = $css; $this->js = $js; $this->sections = $sections; $this->extra = $extra; } public function getExtends(): ?string { return $this->extends; } public function getCss(): array { return $this->css; } public function getJs(): array { return $this->js; } public function getSections(): array { return $this->sections; } public function getExtra(): array { return $this->extra; } }