*/
public void saveValues(Map<Ky, Collection<WideRowValue<Ky, Col, Val>>> grouped)throws ConnectionException {
MutationBatch m = getKeyspace().prepareMutationBatch();
for(Ky kee: grouped.keySet()) {
Iterable<WideRowValue<Ky, Col, Val>> itb = grouped.get(kee);
ColumnListMutation<Col> clm = m.withRow(getColumnFamily(), kee);
Iterator<WideRowValue<Ky, Col, Val>> it = itb.iterator();
while(it.hasNext()) {
WideRowValue<Ky, Col, Val> value = it.next();
putColumn(clm, value);
}