class PrimitiveLongCollections {

    public static MutableLongSet mergeToSet( LongIterable a, LongIterable b )
    {
        final MutableLongSet set = new LongHashSet( a.size() + b.size() );
        set.addAll( a );
        set.addAll( b );
        return set;
    }

    private  PrimitiveLongCollections();

}