PositionProperties positionProperties = GWT.create(PositionProperties.class);
List<ColumnConfig<Position, ?>> columnConfigList = new LinkedList<ColumnConfig<Position, ?>>();
columnConfigList.add(new ColumnConfig<Position, Boolean>(positionProperties.valid(), 0, "Valid"));
ColumnConfig<Position, Date> columnConfigDate = new ColumnConfig<Position, Date>(positionProperties.time(), 0, "Time");
columnConfigDate.setCell(new DateCell(ApplicationContext.getInstance().getFormatterUtil().getTimeFormat()));
columnConfigList.add(columnConfigDate);