hi, need help.
BeanItemContainer containerContracts;
GeneratedPropertyContainer containerMain;
containerContracts = new BeanItemContainer<>(Contract.class);
containerMain = new GeneratedPropertyContainer(containerContracts);
Grid grid = new Grid(containerMain);
…
// refresh
containerContracts.removeAllItems();
containerContracts.addAll(jpaController.findAll());
// not working
whats wrong?