@Override
    public String toString()
    {
        return this.getClass().getSimpleName() + "{" +
            "address=" + address +
            ", streamID=" + streamID +
            ", status=" + status +
            ", isEncrypted=" + isEncrypted() +
            ", isDetached=" + isDetached() +
            ", serverName='" + serverName + '\'' +
            '}';
    }
Returns a text with the available stream features. Each subclass may return different
values depending whether the session has been authenticated or not.

@return a text with the available stream features or {@code null} to add nothing.
xmppserver/src/main/java/org/jivesoftware/openfire/session/LocalSession.java