public static <T> Filter<T> notIn( Collection<? extends T> collection )
    {
        return not( in( collection ) );
    }
Creates a filter that returns true for any value NOT in the specified
 collection and false for all other cases.  This is the equivalent
 of calling not(in(collection)).
jme3-networking/src/main/java/com/jme3/network/Filters.java