WordPress at a glance
function is not described

Automattic\WooCommerce\Admin\Notes\MerchantEmailNotifications

NotificationEmail::get_default_subject() public WC 1.0

Get email subject.

{} It's a method of the class: NotificationEmail{}

No Hooks.

Return

String. Nothing.

Usage

$NotificationEmail = new NotificationEmail();
$NotificationEmail->get_default_subject();

Code of NotificationEmail::get_default_subject() WC 5.2.2

<?php
public function get_default_subject() {
	return $this->note->get_title();
}