Add the ``validation`` middleware if you need to validate the message object before handling it.

Internally it uses the Symfony's validator. If validation fails, a ``ValidationFailedException``

will be thrown that you can catch and read errors from.

Internally it uses the Symfony's validator. The:class:`Symfony\\Component\\Messenger\\Stamp\\ValidationStamp` should

be used to configure the validation groups. If validation fails,

a ``ValidationFailedException`` will be thrown that you can catch

and read errors from.

Messenger Events