blueflood-core/src/main/java/com/rackspacecloud/blueflood/eventemitter/Emitter.java
public List<Listener> listeners(String event) {
        ConcurrentLinkedQueue<Listener> callbacks = this.callbacks.get(event);
        return callbacks != null ?
                new ArrayList<Listener>(callbacks) : new ArrayList<Listener>();
    }
public List<Listener> listeners(String event) {
        ConcurrentLinkedQueue<Listener> callbacks = this.callbacks.get(event);
        return callbacks != null ?
                new ArrayList<Listener>(callbacks) : new ArrayList<Listener>();
    }
Returns a list of listeners for the specified event.

@param event an event name.
@return a reference to this object.