code: @Override
      public boolean persistIfPossible(Command command) {
          if(!(command instanceof CommandJdo)) {
              // ought not to be the case, since this service created the object in the #create() method
              return false;
          }
          final CommandJdo commandJdo = (CommandJdo)command;
          repositoryService.persist(commandJdo);
          return true;
      }
docs: region > persistIfPossible (API)