code: public JingleSession createOutgoingJingleSession(EntityFullJid responder) throws XMPPException {
          JingleSession session = new JingleSession(connection, null, connection.getUser(), responder, jingleMediaManagers);
  
          triggerSessionCreated(session);
  
          return session;
      }
docs: Creates an Jingle session to start a communication with another user.
  
  @param responder    the fully qualified jabber ID with resource of the other
  user.
  @return The session on which the negotiation can be run.