docs: public static int getDataId(String moduleName, String dataName) {
          PmiModuleConfig config = PerfModules.getConfig(moduleName);
          // attach module name to it - this has to be consistent with the PMI xml config files
          // under com/ibm/websphere/pmi/xxModule.xml
          if (dataName.indexOf('.') < 0)
              dataName = moduleName + "." + dataName;
          if (config != null)
              return config.getDataId(dataName);
          else
              return -1;
      }