Class AbstractReturningCallbackListener

Class AbstractReturningCallbackListener.

Abstract base class for callbacks that are returning a value.

DcGeneral\Contao\Callback\AbstractReturningCallbackListener

Abstract
Namespace: DcGeneral\Contao\Callback
Package: DcGeneral\Contao\Callback
Located at Contao/Callback/AbstractReturningCallbackListener.php

Methods summary
`abstract public`	# `update( Symfony\Component\EventDispatcher\Event $event, mixed $value )` Update the values in the event with the value returned by the callback. Update the values in the event with the value returned by the callback. Parameters `$event` `Symfony\Component\EventDispatcher\Event` $event The event being emitted. `$value` `mixed` $value The value returned by the callback.
`public`	# `__invoke( Symfony\Component\EventDispatcher\Event $event )` Invoke the callback. Invoke the callback. Parameters `$event` `Symfony\Component\EventDispatcher\Event` $event The Event for which the callback shall be invoked. Overrides `DcGeneral\Contao\Callback\AbstractCallbackListener::__invoke()`

Methods inherited from DcGeneral\Contao\Callback\AbstractCallbackListener
`__construct(), getArgs(), getCallback()`

Properties inherited from DcGeneral\Contao\Callback\AbstractCallbackListener
`$callback`