willdurand/BazingaGeocoderBundle — comment on commit edc7c74daeb2d9a1ad1310b80afb759aaa1ca828
File: DependencyInjection/Configuration.php line 44
By stof:

use ``->isRequired()->cannotBeEmpty()`` here, it would be more accurate.

Your validation will probably not work if the user omits the key totally as the node will not be set at all. ``isRequired`` will solve it, and ``cannotBeEmpty`` will do what you currently do by hand