public void broadcast(String name, Tree payload, Groups groups) {
		eventbus.broadcast(name, payload, groups, false);
	}
public void broadcast ( String name , Tree payload , Groups groups ) { eventbus . broadcast ( name , payload , groups , false ) ; }
Emits an event to <b>ALL</b> listeners from the specified event group(s),
who are listening this event. Sample code:<br>
<br>
Tree params = new Tree();<br>
params.put("a", true);<br>
params.putList("b").add(1).add(2).add(3);<br>
ctx.broadcast("user.created", params, Groups.of("group1", "group2"));

@param name
name of event (eg. "user.modified")
@param payload
{@link Tree} structure (payload of the event)
@param groups
{@link Groups event group} container