public function __get( $key ) {
		wc_doing_it_wrong( $key, 'Webhook properties should not be accessed directly.', '3.2' );

		switch ( $key ) {
			case 'id' :
				$value = $this->get_id();
				break;
			case 'status' :
				$value = $this->get_status();
				break;
			case 'post_data' :
				$value = null;
				break;
			case 'delivery_url' :
				$value = $this->get_delivery_url();
				break;
			case 'secret' :
				$value = $this->get_secret();
				break;
			case 'topic' :
				$value = $this->get_topic();
				break;
			case 'hooks' :
				$value = $this->get_hooks();
				break;
			case 'resource' :
				$value = $this->get_resource();
				break;
			case 'event' :
				$value = $this->get_event();
				break;
			case 'failure_count' :
				$value = $this->get_failure_count();
				break;
			case 'api_version' :
				$value = $this->get_api_version();
				break;

			default :
				$value = '';
				break;
		} // End switch().

		return $value;
	}