type = $type; $this->description = $description; } public function __toString(): string { return trim("{$this->type} {$this->description}"); } /** * @param array $properties */ public static function __set_state(array $properties): self { $instance = new self($properties['type'], $properties['description']); if (isset($properties['attributes'])) { foreach ($properties['attributes'] as $key => $value) { $instance->setAttribute($key, $value); } } return $instance; } }