class TestExample

class TestExample extends AreaPluginBase {
    
    /**
     * {@inheritdoc}
     */
    public function access(AccountInterface $account) {
        return $this->options['custom_access'];
    }
    
    /**
     * {@inheritdoc}
     */
    public function defineOptions() {
        $options = parent::defineOptions();
        $options['string'] = [
            'default' => '',
        ];
        $options['custom_access'] = [
            'default' => TRUE,
        ];
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildOptionsForm(&$form, FormStateInterface $form_state) {
        parent::buildOptionsForm($form, $form_state);
        $this->globalTokenForm($form, $form_state);
    }
    
    /**
     * {@inheritdoc}
     */
    public function render($empty = FALSE) {
        if (!$empty || !empty($this->options['empty'])) {
            return [
                '#markup' => $this->globalTokenReplace($this->options['string']),
            ];
        }
        return [];
    }

}