code: private void printInstanceNames() {
          try {
              System.out.println("Instance name defined in database for server PowerSupply :");
              final String[] instnames = ApiUtil.get_db_obj().get_instance_name_list(ds_exec_name);
              for (final String instname : instnames) {
                  System.out.println("\t" + instname);
              }
          } catch (final DevFailed e) {
              Except.print_exception(e);
          }
      }
docs: +----------------------------------------------------------------------------