code: private Map<ObjectID, Map<String, String>> fetchScalarFields(TableDefinition tableDef,
  			Collection<ObjectID> ids, List<String> fields, String category) {
  		timers.start(category, "Init Fields");
  		Map<ObjectID, Map<String, String>> map = SpiderHelper.getScalarValues(tableDef, ids, fields);
  		long time = timers.stop(category, "Init Fields", ids.size());
         	log.debug("fetch {} {} ({})", new Object[] {ids.size(), category, Timer.toString(time)});
  		return map;
  	}
docs: Fetches the scalar field values of the specified set of entities
  
  @param tableDef     entity type
  @param keys         entity id list
  @param scalarFields field name list
  @return             result of {@link #multiget_slice(List, ColumnParent, SlicePredicate)} execution