* user to invite
* @param reasonText
* reason for the invitation
*/
public void sendInvitationTo(final XmppURI userJid, final String reasonText) {
final Stanza message = new Message();
message.setTo(roomUri.getJID());
final XMLPacket invite = message.getXML().addChild("x", XmppNamespaces.MUC_USER).addChild("invite");
invite.setAttribute("to", userJid.toString());
invite.setChildText("reason", reasonText);
eventBus.fireEventFromSource(new BeforeRoomInvitationSentEvent(message, invite), this);
session.send(message);