@Override
    public Dataframe copy() {
        Dataframe d = new Dataframe(configuration);

        for(Map.Entry<Integer, Record> e : entries()) {
            Integer rId = e.getKey();
            Record r = e.getValue();
            d.set(rId, r);
        }
        return d;
    }
@ Override public Dataframe copy ( ) { Dataframe d = new Dataframe ( configuration ) ; for ( Map . Entry < Integer , Record > e : entries ( ) ) { Integer rId = e . getKey ( ) ; Record r = e . getValue ( ) ; d . set ( rId , r ) ; } return d ; }
{@inheritDoc}