WordPress at a glance
function is not described

Automattic\WooCommerce\Vendor\League\Container\Argument

ClassNameWithOptionalValue::getClassName() public WC 1.0

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

No Hooks.

Return

Null. Nothing.

Usage

$ClassNameWithOptionalValue = new ClassNameWithOptionalValue();
$ClassNameWithOptionalValue->getClassName(): string;

Code of ClassNameWithOptionalValue::getClassName() WC 5.0.0

<?php
public function getClassName(): string
{
    return $this->className;
}