Dispatched to resolve a URL into a value: any registered listener that can answer it calls $event->setReturn($value) (Signal), and the caller reads it back via Signal::getReturn.
class MMO\core\events\Fetch extends MMO\core\events\Signal
implements MMO\core\interfaces\iStoppableEvent
use MMO\core\classes\tWithOptions,
MMO\core\classes\tStoppableEvent
Used e.g. to load configuration/i18n/xml files by URL, and by [`Container::Fetch`](https://mmoframework.fr/fr/documentation/mmo.core/php/helpers/Container.md#container-fetch).
if true, a list-valued option is appended to (rather than replaced by) the corresponding list in $opts -- see \MMO\core\arrays\merge for the exact semantics
Collect every listener for this class, including those registered on its parent classes (so a subclass event is also caught by listeners of its parent event), sorted by ascending $order (ties keep …
Change the order of an already-registered listener, whether added directly via AddListener or indirectly via ConnectListeners (which also stores its [$obj, $methodName] callables here).