element * * @param string $value * @return $this */ public function setInputName($value) { return $this->setName($value); } /** * Set "id" for element * * @param $value * @return $this */ public function setInputId($value) { return $this->setId($value); } /** * Render block HTML * * @return string */ public function _toHtml(): string { if (!$this->getOptions()) { $this->setOptions($this->getSourceOptions()); } return parent::_toHtml(); } private function getSourceOptions(): array { return [ ['label' => 'Products from the same category as current product', 'value' => '1'], ['label' => 'Products from other categories', 'value' => '0'], ]; } }