public MuleEvent(UMOMessage message, UMOEndpoint endpoint, UMOSession session, boolean synchronous)
public MuleEvent(UMOMessage message, UMOEndpoint endpoint, UMOComponent component, UMOEvent previousEvent)
    public MuleEvent(UMOMessage message, UMOEndpoint endpoint, UMOSession session, boolean synchronous)    {        this(message, endpoint, session, synchronous, null);    }