code: public String get_attribute_alias(Database database, String attname)
              throws DevFailed {
          if (!database.isAccess_checked()) checkAccess(database);
  
          DeviceData argIn = new DeviceData();
          argIn.insert(attname);
          DeviceData argOut = command_inout(database, "DbGetAttributeAlias", argIn);
          return argOut.extractString();
      }
docs: ==========================================================================