no problem when you work in dev in app_dev.php
expand the bottom SF toolbar, click on status 200 or on @your_rote_name you will redirect to smt like localhost/_profiler/s0meha5h?panel=* then click on the left menu on TWIG , then the URL will be like localhost/_profiler/s0meha5h?panel=twig
and you will see all the templates, such as FolderYourBundle: Folder: twig_file_name.html.twig, which loads one at a time!
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