code: public String get_class_for_device(Database database, String deviceName)
              throws DevFailed {
          if (!database.isAccess_checked()) checkAccess(database);
  
          DeviceData argIn = new DeviceData();
          argIn.insert(deviceName);
          DeviceData argOut = command_inout(database, "DbGetClassForDevice", argIn);
          return argOut.extractString();
      }
docs: /* (non-Javadoc)
  @see fr.esrf.TangoApi.IDatabaseDAO#get_class_for_device(java.lang.String)