/**
 * Helper wrapper for adding emails to queue.
 *
 * @see Simple_Email_Queue::add_to_queue()
 *
 * @since 1.0
 *
 * @param string|array $to          Array or comma-separated list of email addresses to send message.
 * @param string       $subject     Email subject.
 * @param string       $message     Message contents.
 * @param string|array $headers     Optional. Additional headers.
 * @param string|array $attachments Optional. Files to attach.
 */
function simple_email_queue_add($to, $subject, $message, $headers = '', $attachments = array())
{
    Simple_Email_Queue::get_instance()->add_to_queue($to, $subject, $message, $headers, $attachments);
}
 /**
  * Load plugin.
  *
  * @since 1.0
  * @access public
  */
 public static function plugins_loaded()
 {
     // Initialize class
     $simple_email_queue = Simple_Email_Queue::get_instance();
 }