class PrimitiveLongIntKeyValueArray {

    public long[] keys()
    {
        return Arrays.copyOfRange( naturalKeys, 0, size );
    }

    public  PrimitiveLongIntKeyValueArray( int initialCapacity, double growthFactor );
    public  PrimitiveLongIntKeyValueArray( int initialCapacity );
    public  PrimitiveLongIntKeyValueArray();

}