public void removeServerIdentitiesProvider(ServerIdentitiesProvider provider) {
        if ( provider == null )
        {
            throw new NullPointerException( "Argument 'provider' cannot be null." );
        }
        serverIdentityProviders.remove( provider );
    }
Removes this provider of identities.

@param provider The provider of identities.
xmppserver/src/main/java/org/jivesoftware/openfire/disco/IQDiscoInfoHandler.java