You can also register your own custom namespaces. Suppose that you're using

some third-party library that includes Twig templates that live in

``vendor/acme/foo-project/templates``. First, register a namespace for this

``vendor/acme/foo-bar/templates``. First, register a namespace for this

directory:

..configuration-block::

The registered namespace is called ``foo_bar``, which refers to the

``vendor/acme/foo-project/templates`` directory. Assuming there's a file

``vendor/acme/foo-bar/templates`` directory. Assuming there's a file

called ``sidebar.twig`` in that directory, you can use it easily:

..code-block::jinja