Automattic\WP\Cron_Control\Main::admin_notice PHP Метод

    public function admin_notice()
    {
        ?>
		<div class="notice notice-error">
			<p><?php 
        printf(__('<strong>%1$s</strong>: To use this plugin, define the constant %2$s.', 'automattic-cron-control'), 'Cron Control', '<code>WP_CRON_CONTROL_SECRET</code>');
        ?>
</p>
		</div>
		<?php 
    }