98      * @param   string  $listenerId    Listener ID.
103     public function attach($listenerId, $callable)  argument
105         if (false === $this->listenerExists($listenerId)) {
109                 $listenerId
114         $this->_callables[$listenerId][$callable->getHash()] = $callable;
122      * @param   string  $listenerId    Listener ID.
126     public function detach($listenerId, $callable)  argument
128         unset($this->_callables[$listenerId][xcallable($callable)->getHash()]);
136      * @param  string  $listenerId    Listener ID.
139     public function detachAll($listenerId)  argument
141         unset($this->_callables[$listenerId]);
149      * @param   string  $listenerId    Listener ID.
152     public function listenerExists($listenerId)  argument
154         return array_key_exists($listenerId, $this->_callables);
160      * @param   string             $listenerId    Listener ID.
165     public function fire($listenerId, Bucket $data)  argument
167         if (false === $this->listenerExists($listenerId)) {
171                 $listenerId
178         foreach ($this->_callables[$listenerId] as $callable) {