and it controls the order in which listeners are executed (the higher the

number, the earlier a listener is executed). This is useful when you need to

guarantee that one listener is executed before another. The priorities of the

internal Symfony listeners usually range from ``-255`` to ``255`` but your

internal Symfony listeners usually range from ``-256`` to ``256`` but your

own listeners can use any positive or negative integer.

.. _events-subscriber: