All classes that implement HasDispatcherInterface

class \Guzzle\Common\AbstractHasDispatcher implements HasDispatcherInterface
class \Guzzle\Http\Client implements ClientInterface
class \Guzzle\Http\Curl\CurlMulti implements CurlMultiInterface
class \Guzzle\Http\Message\EntityEnclosingRequest implements EntityEnclosingRequestInterface
class \Guzzle\Http\Message\Request implements RequestInterface