Challenge 1 / 2

What would happen if I added the following config to config/packages/twig.yaml?

twig:
    global_variables:
        foo: 1234

This would add a new global variable to all templates called foo set to the value 1234.

This would throw an exception: global_variables is not a valid config key under twig.

This would configure a new service called global_variables and pass it the config below.