docs: @Override
      public <O> O get(final String key, final Class<O> datatype) {
          StaticBuffer column = string2StaticBuffer(key);
          final KeySliceQuery query = new KeySliceQuery(rowKey,column, BufferUtil.nextBiggerBuffer(column));
          StaticBuffer result = BackendOperation.execute(new BackendOperation.Transactional<StaticBuffer>() {
              @Override
              public StaticBuffer call(StoreTransaction txh) throws BackendException {
                  List<Entry> entries = store.getSlice(query,txh);
                  if (entries.isEmpty()) return null;
                  return entries.get(0).getValueAs(StaticBuffer.STATIC_FACTORY);
              }
  
              @Override
              public String toString() {
                  return "getConfiguration";
              }
          }, txProvider, times, maxOperationWaitTime);
          if (result==null) return null;
          return staticBuffer2Object(result, datatype);
      }