apply_filters( 'comment_notification_subject', string $subject, string $comment_id )

1869			 *1870			 * @since 1.5.21871			 *1872			 * @param string $subject    The comment notification email subject.1873			 * @param string $comment_id Comment ID as a numeric string.1874			 */1875			$subject = apply_filters( 'comment_notification_subject', $subject, $comment->comment_ID );1876 1877			wp_mail( $email, wp_specialchars_decode( $subject ), $notify_message, $message_headers );1878 1879			if ( $switched_locale ) {1880				restore_previous_locale();1881			}