protected HGrid onReadByIds(HRef[] ids) {
HGridBuilder b = new HGridBuilder();
b.addCol("id");
for (int i = 0; i < ids.length; ++i)
b.addRow(new HVal[] { ids[i] });
HGrid req = b.toGrid();
return call("read", req);
}
@Override
protected HGrid onReadAll(String filter, int limit) {