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3 liveuser 1 
<?php
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namespace Guzzle\Common;
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use Symfony\Component\EventDispatcher\EventDispatcher;
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use Symfony\Component\EventDispatcher\EventDispatcherInterface;
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use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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/**
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 * Class that holds an event dispatcher
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 */
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class AbstractHasDispatcher implements HasDispatcherInterface
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{
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    /** @var EventDispatcherInterface */
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    protected $eventDispatcher;
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    public static function getAllEvents()
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    {
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        return array();
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    }
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    public function setEventDispatcher(EventDispatcherInterface $eventDispatcher)
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    {
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        $this->eventDispatcher = $eventDispatcher;
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        return $this;
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    }
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    public function getEventDispatcher()
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    {
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        if (!$this->eventDispatcher) {
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            $this->eventDispatcher = new EventDispatcher();
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        }
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        return $this->eventDispatcher;
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    }
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    public function dispatch($eventName, array $context = array())
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    {
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        return $this->getEventDispatcher()->dispatch($eventName, new Event($context));
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    }
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    public function addSubscriber(EventSubscriberInterface $subscriber)
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    {
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        $this->getEventDispatcher()->addSubscriber($subscriber);
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        return $this;
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    }
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}