@Override
    public Directory<SharingProfile> getSharingProfileDirectory()
            throws GuacamoleException {
        return new SimpleDirectory<SharingProfile>();
    }
{@inheritDoc}

<p>This implementation simply returns an empty {@link Directory}.
Implementations that wish to provide screen sharing functionality
through the use of sharing profiles should override this function.
guacamole-ext/src/main/java/org/apache/guacamole/net/auth/AbstractUserContext.java