What does * in the controller means?

Question

There is this code in Magento 2 in

Magento\Catalog\Controller\Adminhtml\Product\Save.php

if ($redirectBack === 'new') 
{            
   $resultRedirect->setPath('catalog/*/new'
                           ,['set' => $productAttributeSetId
                                ,'type' => $productTypeId]);

Can anyone tell me what does 'catalog/*/new' refers to? I have checked the controller folder and haven't found new.php file anywhere.

Answer 1

It means that the current part of the route will be used in that position. So if the current route is catalog/product/index then catalog/*/new will be catalog/product/new.